Translation mappings to be used with Bukkit's Material names and Minecrafts translation system, needs ConfigAccessor.java: https://gist.github.com/Phoenix616/a629223a89b60d710da457f5f7f57ecc

TranslationMapping.java

/*
 * TranslationMapping is an util for mapping pre 1.13 Bukkit materials to 
 * the language keys of minecraft items in the language files of the client
 *
 * Licensed under the following (MIT) license:
 *
 * Copyright (C) 2018 Max Lee (https://github.com/Phoenix616)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import org.bukkit.DyeColor;
import org.bukkit.Material;
import org.bukkit.configuration.ConfigurationSection;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.BannerMeta;
import org.bukkit.inventory.meta.PotionMeta;
import org.bukkit.inventory.meta.SkullMeta;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.HashMap;
import java.util.Map;

public class TranslationMapping {
    
    Map<String, String> transmap = new HashMap<String, String>();
    
    ConfigAccessor langconfig;

    public TranslationMapping(JavaPlugin plugin) {
        plugin.getLogger().info("Loading TranslationMapping...");

        langconfig = new ConfigAccessor(plugin, "transmapping.yml");
        langconfig.saveDefaultConfig();
        langconfig.reloadConfig();

        ConfigurationSection blocksection = langconfig.getConfig().getConfigurationSection("mapping");
        for(String matname : blocksection.getKeys(false)) {
            try {
                String matkey = matname.toUpperCase();
                Material.valueOf(matkey);
                
                if(blocksection.isConfigurationSection(matname)) {
                    ConfigurationSection extrasection = blocksection.getConfigurationSection(matname);
                    String general = extrasection.getString("general");
                    if(general != null) {
                        transmap.put(matkey, general);
                    }
                    String template = extrasection.getString("template");
                    if(template != null) {
                        ConfigurationSection templatesection = langconfig.getConfig().getConfigurationSection("templates." + template);
                        if(templatesection != null) {
                            for(String damage : templatesection.getKeys(false)) {
                                String mckey = templatesection.getString(damage);
                                if(general != null) {
                                    mckey = general + "." + mckey;
                                }
                                transmap.put(matkey + ":" + damage, mckey);
                            }
                        } else {
                            plugin.getLogger().warning("[TranslationMapping] The template " + template + " does not exist!");
                        }
                    }
                    
                    ConfigurationSection damagesection = extrasection.getConfigurationSection("types");
                    if(damagesection != null) {
                        for(String damage : damagesection.getKeys(false)) {
                            String mckey = damagesection.getString(damage);
                            if(general != null) {
                                mckey = general + "." + mckey;
                            }
                            transmap.put(matkey + ":" + damage, mckey);
                        }
                    }
                } else {
                    transmap.put(matkey, blocksection.getString(matname));
                }

                //plugin.getLogger().info("[TranslationMapping] Loaded mapping for Material." + s);
            } catch (IllegalArgumentException e) {
                plugin.getLogger().warning("[TranslationMapping] " + matname + " is not a valid Bukkit material name!");
            }
        }
        plugin.getLogger().info("TranslationMapping loaded.");
    }

    public String getKey(ItemStack item) {
        Material mat = item.getType();
        if(mat == Material.SKULL_ITEM && item.getItemMeta() instanceof SkullMeta && ((SkullMeta) item.getItemMeta()).getOwner() != null) {
            return "item.skull.player.name";
        }
        String trans = "";
        int data = item.getDurability();
        if(item.hasItemMeta() && item.getItemMeta() instanceof BannerMeta) {
            BannerMeta bm = (BannerMeta) item.getItemMeta();
            DyeColor baseColor = bm.getBaseColor();
            if(baseColor != null) {
                data = baseColor.getDyeData();
            }
        }
        if(item.hasItemMeta() && item.getItemMeta() instanceof PotionMeta) {
            PotionMeta pm = (PotionMeta) item.getItemMeta();
            String effectName = "EMPTY";
            try {
                effectName = pm.getBasePotionData().getType().toString();
            } catch(NoSuchMethodError e) {
                if (!pm.getCustomEffects().isEmpty()) {
                    effectName = pm.getCustomEffects().get(0).getType().toString();
                } else {
                    return "item.potion.name";
                }
            }
            if(transmap.containsKey(mat.toString() + ":" + effectName)) {
                return transmap.get(mat.toString() + ":" + effectName);
            } else if(transmap.containsKey(mat.toString())){
                return transmap.get(mat.toString()) + "." + effectName.toLowerCase();
            }
        } else if(mat == Material.POTION) {
            trans = "item.potion";
        } else if(transmap.containsKey(mat.toString() + ":" + data)) {
            trans = transmap.get(mat.toString() + ":" + data);
        } else if(transmap.containsKey(mat.toString())) {
            trans = transmap.get(mat.toString());
        } else {
            trans = mat.toString().toLowerCase().replace("_block", "").replace("_item", "").replace("_", "");
        }
        if(!trans.startsWith("item.") && !trans.startsWith("tile.")) {
            trans = ((mat.isBlock()) ? "tile." : "item.") + trans;
        }
        return trans + ".name";
    }
}

transmapping.yml

templates:
  colors:    
    15: black
    14: red
    13: green
    12: brown
    11: blue
    10: purple
    9: cyan
    8: silver
    7: gray
    6: pink
    5: lime
    4: yellow
    3: lightBlue
    2: magenta
    1: orange
    0: white
  colorsinverted:
    0: black
    1: red
    2: green
    3: brown
    4: blue
    5: purple
    6: cyan
    7: silver
    8: gray
    9: pink
    10: lime
    11: yellow
    12: lightBlue
    13: magenta
    14: orange
    15: white
  slabs:  
    0: stone
    1: sand
    2: wood
    3: cobble
    4: brick
    5: smoothStoneBrick
    6: netherBrick
    7: quartz
  sandstones:
    0: default
    1: chiseled
    2: smooth
  potions:
    UNCRAFTABLE: empty
    JUMP: leaping
    SPEED: swiftness
    INSTANT_HEAL: healing
    HEAL: healing
    INSTANT_DAMAGE: harming
    HARM: harming
    REGEN: regeneration
mapping:
  STONE: 
    general: stone
    types:
      0: stone
      1: granite
      2: graniteSmooth
      3: diorite
      4: dioriteSmooth
      5: andesite
      6: andestieSmooth
  DIRT: 
    general: dirt
    types:
      0: default
      1: coarse
      2: podzol
  COBBLESTONE: stonebrick
  SAPLING: 
    general: sapling
    types:
      0: oak
      1: spruce
      2: birch
      3: jungle
      4: acacia
      5: big_oak
  SAND:
    general: sand
    types:
      0: default
      1: red
  SANDSTONE:
    general: sandStone
    template: sandstones
  RED_SANDSTONE: 
    general: redSandStone
    template: sandstones
  GOLD_ORE: oreGold
  IRON_ORE: oreIron
  COAL_ORE: oreCoal
  SPONGE: 
    general: sponge
    types:
      0: dry
      1: wet
  LAPIS_ORE: oreLapis
  LAPIS_BLOCK: blockLapis
  NOTE_BLOCK: musicBlock
  POWERED_RAIL: goldenRail
  DETECTOR_RAIL: detectorRail
  PISTON_STICKY_BASE: pistonStickyBase
  LONG_GRASS: tallgrass
  DEAD_BUSH: tallgrass.shrub
  PISTON_BASE: pistonBase
  WOOL:
    general: cloth
    template: colors
  YELLOW_FLOWER: flower1.dandelion
  RED_ROSE: 
    general: flower2
    types:
      0: poppy
      1: blueOrchid
      2: allium
      3: houstonia
      4: tulipRed
      5: tulipOrange
      6: tulipWhite
      7: tulipPink
      8: oxeyeDaisy
  BROWN_MUSHROOM:
  RED_MUSHROOM:
  GOLD_BLOCK: blockGold
  IRON_BLOCK: blockIron
  DOUBLE_STEP:
    general: stoneSlab
    template: slabs
  STEP: 
    general: stoneSlab
    template: slabs
  MOSSY_COBBLESTONE: stoneMoss
  MOB_SPAWNER: mobSpawner
  WOOD_STAIRS: stairsWood
  REDSTONE_WIRE: redstoneDust
  DIAMOND_ORE: oreDiamond
  DIAMOND_BLOCK: blockDiamond
  SOIL: farmland
  BURNING_FURNACE: furnace
  SIGN_POST: sign
  WOODEN_DOOR: doorWood
  RAILS: rail
  COBBLESTONE_STAIRS: stairsStone
  WALL_SIGN: sign
  STONE_PLATE: pressurePlateStone
  IRON_DOOR_BLOCK: doorIron
  WOOD_PLATE: pressurePlateWood
  REDSTONE_ORE: oreRedstone
  GLOWING_REDSTONE_ORE: oreRedstone
  REDSTONE_TORCH_OFF: notGate
  REDSTONE_TORCH_ON: notGate
  STONE_BUTTON: button
  SNOW_BLOCK: snow
  SUGAR_CANE_BLOCK: reeds
  NETHERRACK: hellrock
  SOUL_SAND: hellsand
  GLOWSTONE: lightgem
  JACK_O_LANTERN: litpumpkin
  CAKE_BLOCK: cake
  DIODE_BLOCK_OFF: diode
  DIODE_BLOCK_ON: diode
  STAINED_GLASS: 
    general: stainedGlass
    template: colors
  TRAP_DOOR: trapdoor
  MONSTER_EGGS: monsterStoneEgg
  SMOOTH_BRICK: stonebricksmooth
  HUGE_MUSHROOM_1: mushroom
  HUGE_MUSHROOM_2: mushroom
  IRON_FENCE: fenceIron
  THIN_GLASS: thinGlass
  MELON_BLOCK: melon
  PUMPKIN_STEM: item.pumpkinSeeds
  MELON_STEM: item.melon
  FENCE_GATE: fenceGate
  BRICK_STAIRS: stairsBrick
  SMOOTH_STAIRS: stairsStoneBrickSmooth
  WATER_LILY: waterlily
  NETHER_BRICK: netherBrick
  NETHER_FENCE: netherFence
  NETHER_BRICK_STAIRS: stairsNetherBrick
  NETHER_WARTS: netherStalk
  ENCHANTMENT_TABLE: enchantmentTable
  BREWING_STAND: brewingStand
  ENDER_PORTAL: portal
  ENDER_PORTAL_FRAME: endPortalFrame
  ENDER_STONE: whiteStone
  DRAGON_EGG: dragonEgg
  REDSTONE_LAMP_OFF: redstoneLight
  REDSTONE_LAMP_ON: redstoneLight
  WOOD_DOUBLE_STEP: woodSlab
  WOOD_STEP: woodSlab
  SANDSTONE_STAIRS: stairsSandStone
  EMERALD_ORE: oreEmerald
  ENDER_CHEST: enderChest
  TRIPWIRE_HOOK: tripWireSource
  TRIPWIRE: tripWire
  EMERALD_BLOCK: blockEmerald
  SPRUCE_WOOD_STAIRS: stairsWoodSpruce
  BIRCH_WOOD_STAIRS: stairsWoodBirch
  JUNGLE_WOOD_STAIRS: stairsWoodJungle
  COMMAND: commandBlock
  COBBLE_WALL: 
    general: cobbleWall
    types:
      0: normal
      1: mossy
  FLOWER_POT: item.flowerPot
  CARROT: item.carrots
  POTATO: item.potato
  WOOD_BUTTON: button
  SKULL: item.skull.char
  TRAPPED_CHEST: chestTrap
  GOLD_PLATE: weightedPlate_light
  IRON_PLATE: weightedPlate_heavy
  REDSTONE_COMPARATOR_OFF: comparator
  REDSTONE_COMPARATOR_ON: comparator
  DAYLIGHT_DETECTOR: daylightDetector
  REDSTONE_BLOCK: blockRedstone
  QUARTZ_ORE: netherquartz
  QUARTZ_BLOCK: quartzBlock
  QUARTZ_STAIRS: stairsQuartz
  ACTIVATOR_RAIL: activatorRail
  STAINED_CLAY: 
    general: clayHardenedStained
    template: colors
  STAINED_GLASS_PANE:
    general: thinStainedGlass
    template: colors
  LEAVES_2: leaves
  LOG_2: log
  ACACIA_STAIRS: stairsWoodAcacia
  DARK_OAK_STAIRS: stairsWoodDarkOak
  SLIME_BLOCK: slime
  IRON_TRAPDOOR: ironTrapdoor
  PRISMARINE: 
    general: prismarine
    types:
      0: rough
      1: bricks
      2: dark
  SEA_LANTERN: seaLantern
  HAY_BLOCK: hayBlock
  CARPET: woolCarpet
  HARD_CLAY: clayHardened
  COAL_BLOCK: blockCoal
  PACKED_ICE: icePacked
  DOUBLE_PLANT: 
    general: doublePlant
    types:
      0: sunflower
      1: syringa
      2: grass
      3: fern
      4: rose
      5: paeonia
  STANDING_BANNER:
    general: item.banner
    template: colorsinverted
  WALL_BANNER:
    general: item.banner
    template: colorsinverted
  BANNER:
    general: item.banner
    template: colorsinverted
  DAYLIGHT_DETECTOR_INVERTED: daylightDetector
  RED_SANDSTONE_STAIRS: stairsRedSandStone
  DOUBLE_STONE_SLAB2: stoneSlab2.red_sandstone
  STONE_SLAB2: stoneSlab2.red_sandstone
  SPRUCE_FENCE_GATE: spruceFenceGate
  BIRCH_FENCE_GATE: birchFenceGate
  JUNGLE_FENCE_GATE: jungleFenceGate
  DARK_OAK_FENCE_GATE: darkOakFenceGate
  ACACIA_FENCE_GATE: acaciaFenceGate
  SPRUCE_FENCE: spruceFence
  BIRCH_FENCE: birchFence
  JUNGLE_FENCE: jungleFence
  DARK_OAK_FENCE: darkOakFence
  ACACIA_FENCE: acaciaFence
  SPRUCE_DOOR: doorSpruce
  BIRCH_DOOR: doorBirch
  JUNGLE_DOOR: doorJungle
  ACACIA_DOOR: doorAcacia
  DARK_OAK_DOOR: doorDarkOak
  IRON_SPADE: shovelIron
  IRON_PICKAXE: pickaxeIron
  IRON_AXE: hatchetIron
  FLINT_AND_STEEL: flintAndSteel
  IRON_INGOT: ingotIron
  GOLD_INGOT: ingotGold
  IRON_SWORD: swordIron
  WOOD_SWORD: swordWood
  WOOD_SPADE: shovelWood
  WOOD_PICKAXE: pickaxeWood
  WOOD_AXE: hatchetWood
  STONE_SWORD: swordStone
  STONE_SPADE: shovelStone
  STONE_PICKAXE: pickaxeStone
  STONE_AXE: hatchetStone
  DIAMOND_SWORD: swordDiamond
  DIAMOND_SPADE: shovelDiamond
  DIAMOND_PICKAXE: pickaxeDiamond
  DIAMOND_AXE: hatchetDiamond
  MUSHROOM_SOUP: mushroomStew
  GOLD_SWORD: swordGold
  GOLD_SPADE: shovelGold
  GOLD_PICKAXE: pickaxeGold
  GOLD_AXE: hatchetGold
  WOOD_HOE: hoeWood
  STONE_HOE: hoeStone
  IRON_HOE: hoeIron
  DIAMOND_HOE: hoeDiamond
  GOLD_HOE: hoeGold
  LEATHER_HELMET: helmetCloth
  LEATHER_CHESTPLATE: chestplateCloth
  LEATHER_LEGGINGS: leggingsCloth
  LEATHER_BOOTS: bootsCloth
  CHAINMAIL_HELMET: helmetChain
  CHAINMAIL_CHESTPLATE: chestplateChain
  CHAINMAIL_LEGGINGS: leggingsChain
  CHAINMAIL_BOOTS: bootsChain
  IRON_HELMET: helmetIron
  IRON_CHESTPLATE: chestplateIron
  IRON_LEGGINGS: leggingsIron
  IRON_BOOTS: bootsIron
  DIAMOND_HELMET: helmetDiamond
  DIAMOND_CHESTPLATE: chestplateDiamond
  DIAMOND_LEGGINGS: leggingsDiamond
  DIAMOND_BOOTS: bootsDiamond
  GOLD_HELMET: helmetGold
  GOLD_CHESTPLATE: chestplateGold
  GOLD_LEGGINGS: leggingsGold
  GOLD_BOOTS: bootsGold
  PORK: porkchopRaw
  GRILLED_PORK: porkchopCooked
  GOLDEN_APPLE: appleGold
  WOOD_DOOR: doorOak
  WATER_BUCKET: bucketWater
  LAVA_BUCKET: bucketLava
  IRON_DOOR: doorIron
  SNOW_BALL: snowball
  MILK_BUCKET: milk
  CLAY_BRICK: brick
  CLAY_BALL: clay
  SUGAR_CANE: reeds
  SLIME_BALL: slimeball
  STORAGE_MINECART: minecartChest
  POWERED_MINECART: minecartFurnace
  FISHING_ROD: fishingRod
  WATCH: clock
  GLOWSTONE_DUST: yellowDust
  RAW_FISH:
    general: fish
    types:
      0: cod.raw
      1: salmon.raw
      2: clownfish.raw
      3: pufferfish.raw
  COOKED_FISH:
    general: fish
    types:
      0: cod.cooked
      1: salmon.cooked
  INK_SACK:
    general: dyePowder
    types:
      0: black
      1: red
      2: green
      3: brown
      4: blue
      5: purple
      6: cyan
      7: silver
      8: gray
      9: pink
      10: lime
      11: yellow
      12: lightBlue
      13: magenta
      14: orange
      15: white
  PUMPKIN_SEEDS: seeds_pumpkin
  MELON_SEEDS: seeds_melon
  RAW_BEEF: beefRaw
  COOKED_BEEF: beefCooked
  RAW_CHICKEN: chickenRaw
  COOKED_CHICKEN: chickenCooked
  ROTTEN_FLESH: rottenFlesh
  ENDER_PEARL: enderPearl
  BLAZE_ROD: blazeRod
  GHAST_TEAR: ghastTear
  GOLD_NUGGET: goldNugget
  NETHER_STALK: netherStalkSeeds
  GLASS_BOTTLE: emptyPotion
  SPIDER_EYE: spiderEye
  FERMENTED_SPIDER_EYE: fermentedSpiderEye
  BLAZE_POWDER: blazePowder
  MAGMA_CREAM: magmaCream
  BREWING_STAND_ITEM: brewingStand
  CAULDRON_ITEM: cauldron
  EYE_OF_ENDER: eyeOfEnder
  SPECKLED_MELON: speckledMelon
  MONSTER_EGG: monsterPlacer
  EXP_BOTTLE: expBottle
  BOOK_AND_QUILL: writingBook
  WRITTEN_BOOK: writtenBook
  ITEM_FRAME: frame
  FLOWER_POT_ITEM: flowerPot
  CARROT_ITEM: carrots
  POTATO_ITEM: potato
  BAKED_POTATO: potatoBaked
  POISONOUS_POTATO: potatoPoisonous
  EMPTY_MAP: emptyMap
  GOLDEN_CARROT: carrotGolden
  SKULL_ITEM:
    general: skull
    types:
      0: skeleton
      1: wither
      2: zombie
      3: char
      4: creeper
      5: dragon
  CARROT_STICK: carrotOnAStick
  NETHER_STAR: netherStar
  PUMPKIN_PIE: pumpkinPie
  FIREWORK: fireworks
  FIREWORK_CHARGE: fireworksCharge
  ENCHANTED_BOOK: enchantedBook
  REDSTONE_COMPARATOR: comparator
  NETHER_BRICK_ITEM: netherbrick
  QUARTZ: netherquartz
  EXPLOSIVE_MINECART: minecartTnt
  HOPPER_MINECART: minecartHopper
  PRISMARINE_SHARD: prismarineShard
  PRISMARINE_CRYSTALS: prismarineCrystals
  RABBIT: rabbitRaw
  COOKED_RABBIT: rabbitCooked
  RABBIT_STEW: rabbitStew
  RABBIT_FOOT: rabbitFoot
  RABBIT_HIDE: rabbitHide
  ARMOR_STAND: armorStand
  IRON_BARDING: horsearmormetal
  GOLD_BARDING: horsearmorgold
  DIAMOND_BARDING: horsearmordiamond
  NAME_TAG: nameTag
  COMMAND_MINECART: minecartCommandBlock
  MUTTON: muttonRaw
  COOKED_MUTTON: muttonCooked
  SPRUCE_DOOR_ITEM: doorSpruce
  BIRCH_DOOR_ITEM: doorBirch
  JUNGLE_DOOR_ITEM: doorJungle
  ACACIA_DOOR_ITEM: doorAcacia
  DARK_OAK_DOOR_ITEM: doorDarkOak
  GOLD_RECORD: record
  GREEN_RECORD: record
  RECORD_3: record
  RECORD_4: record
  RECORD_5: record
  RECORD_6: record
  RECORD_7: record
  RECORD_8: record
  RECORD_9: record
  RECORD_10: record
  RECORD_11: record
  RECORD_12: record
  PURPUR_BLOCK: purpurBlock
  PURPUR_DOUBLE_SLAB: purpurSlab
  PURPUR_PILLAR: purpurPillar
  PURPUR_SLAB: purpurSlab
  PURPUR_STAIRS: stairsPurpur
  BEETROOT_SEEDS: beetroot_seeds
  BEETROOT_SOUP: beetroot_soup
  DRAGONS_BREATH: dragon_breath
  CHORUS_FLOWER: chorusFlower
  CHORUS_FRUIT: chorusFruit
  CHORUS_FRUIT_POPPED: chorusFruitPopped
  CHORUS_PLANT: chorusPlant
  END_BRICKS: endBricks
  END_CRYSTAL: end_crystal
  END_GATEWAY: endPortal
  END_ROD: endRod
  POTION:
    general: potion.effect
    template: potions
  LINGERING_POTION:
    general: lingering_potion.effect
    template: potions
  SPLASH_POTION:
    general: splash_potion.effect
    template: potions
  TIPPED_ARROW:
    general: tipped_arrow.effect
    template: potions
  GRASS_PATH: grassPath
  BOAT: boat.oak
  BOAT_ACACIA: boat.acacia
  BOAT_BIRCH: boat.birch
  BOAT_DARK_OAK: boat.dark_oak
  BOAT_JUNGLE: boat.jungle
  BOAT_SPRUCE: boat.spruce
  NETHER_WART_BLOCK: netherWartBlock
  RED_NETHER_BRICK: redNetherBrick
  BONE_BLOCK: boneBlock