diff --git a/.gitignore b/.gitignore
index 2a0e38f..f6e905c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .idea/
 /vocab/.custom/
+**/.custom/
\ No newline at end of file
diff --git a/vocab/.custom/README.md b/vocab/.custom/README.md
deleted file mode 100644
index b2605d2..0000000
--- a/vocab/.custom/README.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# Meervoudsvormen op basis van woordenlijst
-
-Op basis van [wordlist.txt](../wordlist.txt) worden een aantal meervoudsregels getest of dit meervoud voorkomt in [nouns-meervouden.txt](../experimenteel/nouns-meervouden.txt).
-
-
-## Genereren van nieuwe lijst
-
-- Voer eerst ```node irregulars.js``` uit. Dit genereert een lijst met uitzonderingen van de meeste woorden.
-- Daarna: ```node fetchPlurals.js```. Dit kan een tijdje duren, maar geeft een output: ```nouns.json```. Deze lijst kan je dan gebruiken.
\ No newline at end of file
diff --git a/vocab/.custom/fetchPlurals.js b/vocab/.custom/fetchPlurals.js
deleted file mode 100644
index 6e6e019..0000000
--- a/vocab/.custom/fetchPlurals.js
+++ /dev/null
@@ -1,145 +0,0 @@
-var fs = require("fs");
-let path = require("path");
-var irregularFile = "irregular.json";
-var outputFile = "nouns.json";
-var helpers = require("./language-helpers");
-
-try {
-  fs.unlinkSync(path.join(__dirname, outputFile));
-  console.log("Output file deleted.");
-} catch (error) {
-  console.log(error);
-}
-
-var nouns = JSON.parse(fs.readFileSync(path.join(__dirname, irregularFile), "utf8"));
-var words = fs.readFileSync(path.join(__dirname, "../wordlist.txt"), "utf8").toString().split("\n");
-
-var checkPlural = function (word) {
-  if (!word.match(/^[a-zA-Z]*/g)) {
-    console.log("niet alpha");
-    return false;
-  }
-
-  // if word isn't an irregular or doesn't exist yet
-  if (nouns.hasOwnProperty(word)) {
-    console.log("irregular");
-    return false;
-  }
-
-  // test if a pluralrule is listed in plurals list
-  if (word.match(/\w*erik\b/)) {
-    if (helpers.doesPluralExists(word + "en")) {
-      nouns[word] = word + "en";
-      return true;
-    }
-  }
-
-  if (helpers.endsWithVowel(word)) {
-    if (helpers.doesPluralExists(word + "ën")) {
-      nouns[word] = word + "ën";
-      return true;
-    }
-    if (helpers.doesPluralExists(word + "ëen")) {
-      nouns[word] = word + "ëen";
-      return true;
-    }
-    if (helpers.doesPluralExists(word + "en")) {
-      nouns[word] = word + "en";
-      return true;
-    }
-  }
-  if (helpers.endsWithDoubleConsonant(word)) {
-    if (helpers.endswithStemloos(word)) {
-      var lastCharacter = word.charAt(word.length - 1);
-      basicword = word.substring(0, word.length - 1);
-      lastCharacter = lastCharacter.replace("f", "v");
-      if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-        nouns[word] = basicword + lastCharacter + "en";
-        return true;
-      }
-      lastCharacter = lastCharacter.replace("s", "z");
-      if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-        nouns[word] = basicword + lastCharacter + "en";
-        return true;
-      }
-    }
-    if (helpers.doesPluralExists(word + "en")) {
-      nouns[word] = word + "en";
-      return true;
-    }
-    if (helpers.doesPluralExists(word + "s")) {
-      nouns[word] = word + "s";
-      return true;
-    }
-  }
-  if (helpers.endsWithConsonant(word)) {
-    var lastCharacter = word.charAt(word.length - 1);
-    basicword = word.substring(0, word.length - 2);
-    if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-      nouns[word] = basicword + lastCharacter + "en";
-      return true;
-    }
-    
-    if (helpers.doesPluralExists(word + word.slice(-1) + "en")) {
-      nouns[word] = word + word.slice(-1) + "en";
-      return true;
-    }
-
-    if (helpers.endswithStemloosVowel(word)) {
-      var lastCharacter = word.charAt(word.length - 1);
-      basicword = word.substring(0, word.length - 1);
-
-      if (helpers.endsWithSingleConsonant(basicword)) {
-        basicword = word.substring(0, word.length - 2);
-        lastCharacter = lastCharacter.replace("f", "v");
-        console.log(basicword + lastCharacter + "en");
-        if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-          nouns[word] = basicword + lastCharacter + "en";
-          return true;
-        }
-        lastCharacter = lastCharacter.replace("s", "z");
-        if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-          nouns[word] = basicword + lastCharacter + "en";
-          return true;
-        }
-      } else {
-        lastCharacter = lastCharacter.replace("f", "v");
-        if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-          nouns[word] = basicword + lastCharacter + "en";
-          return true;
-        }
-        lastCharacter = lastCharacter.replace("s", "z");
-        if (helpers.doesPluralExists(basicword + lastCharacter + "en")) {
-          nouns[word] = basicword + lastCharacter + "en";
-          return true;
-        }
-      }
-    }
-  }
-
-  if (helpers.doesPluralExists(word + "'s")) {
-    nouns[word] = word + "'s";
-    return true;
-  }
-
-  if (helpers.doesPluralExists(word + "s")) {
-    nouns[word] = word + "s";
-    return true;
-  }
-
-  console.log("niet gevonden");
-  return false;
-};
-
-words.forEach((word, index) => {
-  console.log(word);
-  checkPlural(word);
-});
-
-console.log(nouns);
-
-
-let data = JSON.stringify(nouns);
-fs.writeFile(path.join(__dirname, outputFile), data, err => {
-  console.log("done");
-});
diff --git a/vocab/.custom/irregulars.js b/vocab/.custom/irregulars.js
deleted file mode 100644
index ac7b732..0000000
--- a/vocab/.custom/irregulars.js
+++ /dev/null
@@ -1,235 +0,0 @@
-var fs = require("fs");
-let path = require("path");
-var outputFile = "irregular.json";
-
-var nounString,
-  nouns;
-
-var irregulars = {
-  been: [
-    "beenderen", "benen"
-  ],
-  blad: [
-    "bladeren", "bladen", "blaren"
-  ],
-  ei: "eieren",
-  gelid: "gelederen",
-  gemoed: "gemoederen",
-  goed: "goederen",
-  hoen: "hoenderen",
-  kalf: "kalveren",
-  kind: "kinderen",
-  kleed: [
-    "kleren", "klederen", "kleden"
-  ],
-  lam: "lammeren",
-  lied: "liederen",
-  rad: "raderen",
-  rund: "runderen",
-  volk: [
-    "volken", "volkeren"
-  ],
-  koe: "koeien",
-  vlo: "vlooien",
-  leerrede: [
-    "leerredenen", "leerredes"
-  ],
-  lende: [
-    "lendenen", "lenden"
-  ],
-  kleinood: [
-    "kleinoden", "kleinodiën"
-  ],
-  sieraad: [
-    "sieraden", "sieradiën"
-  ],
-  epos: [
-    "epen", "epossen"
-  ],
-  genius: "geniën",
-  aanbod: "aanbiedingen",
-  beleg: [
-    "beleggingen", "belegeringen"
-  ],
-  dank: "dankbetuigingen",
-  doel: [
-    "doeleinden", "doelen"
-  ],
-  gedrag: "gedragingen",
-  genot: "genietingen",
-  lof: [
-    "loftuitingen", "lofbetuigingen"
-  ],
-  onderzoek: [
-    "onderzoekingen", "onderzoeken"
-  ],
-  raad: "raadgevingen",
-  rede: [
-    "redevoeringen", "redes"
-  ],
-  fotograaf: "fotografen",
-  paragraaf: "paragrafen",
-  telegraaf: "telegrafen",
-  burggraaf: "burggraven",
-  loopgraaf: "loopgraven",
-  filosoof: "filosofen",
-  theosoof: "theosofen",
-  elf: "elfen",
-  paraaf: "parafen",
-  stad: "steden",
-  bad: "baden",
-  bedrag: "bedragen",
-  blad: [
-    "bladeren", "bladen", "blaren"
-  ],
-  dag: "dagen",
-  dak: "daken",
-  dal: "dalen",
-  gat: "gaten",
-  gelag: "gelagen",
-  glas: "glazen",
-  graf: "graven",
-  pad: [
-    "paden", "padden"
-  ],
-  slag: "slagen",
-  staf: [
-    "staffen", "staven"
-  ],
-  vat: "vaten",
-  verdrag: "verdragen",
-  handvat: [
-    "handvatten", "handvaten"
-  ],
-  bevel: "bevelen",
-  gebed: "gebeden",
-  gebrek: "gebreken",
-  gen: "genen",
-  spel: "spelen",
-  tred: "treden",
-  weg: "wegen",
-  gemet: "gemeten",
-  bijzonderheid: "bijzonderheden",
-  kleinigheid: "kleinigheden",
-  moeilijkheid: "moeilijkheden",
-  lid: "leden",
-  rif: "reven",
-  schip: "schepen",
-  smid: "smeden",
-  spit: [
-    "spitten", "speten"
-  ],
-  alcohol: "alcoholen",
-  elektron: "elektronen",
-  neutron: "neutronen",
-  proton: "protonen",
-  gebod: "geboden",
-  god: "goden",
-  hertog: "hertogen",
-  hof: "hoven",
-  hol: "holen",
-  kot: [
-    "kotten", "koten"
-  ],
-  lot: "loten",
-  oorlog: "oorlogen",
-  schot: "schoten",
-  slot: "sloten",
-  verbod: "verboden",
-  verlof: "verloven",
-  kruis: "kruizen",
-  pers: "persen",
-  balans: "balansen",
-  concours: "concoursen",
-  dans: "dansen",
-  diocees: "diocesen",
-  eis: "eisen",
-  forens: [
-    "forensen", "forenzen"
-  ],
-  impuls: "impulsen",
-  kaars: "kaarsen",
-  kans: "kansen",
-  kers: "kersen",
-  kikvors: "kikvorsen",
-  koers: "koersen",
-  kous: "kousen",
-  krans: "kransen",
-  lans: "lansen",
-  mars: "marsen",
-  mens: "mensen",
-  ons: [
-    "onsen", "onzen"
-  ],
-  paus: "pausen",
-  plons: [
-    "plonsen", "plonzen"
-  ],
-  pols: "polsen",
-  prins: "prinsen",
-  pruis: "pruisen",
-  saus: [
-    "sausen", "sauzen"
-  ],
-  schans: "schansen",
-  spons: [
-    "sponzen", "sponsen"
-  ],
-  stimulans: "stimulansen",
-  tendens: "tendensen",
-  trans: "transen",
-  wals: "walsen",
-  wens: "wensen",
-  zeis: "zeisen",
-  einde: ["eindes", "einden"],
-  symbool: "symbolen",
-  knop: ["knopen", "knoppen"]
-};
-
-// https://e-ans.ivdnt.org/topics/pid/ans03050402lingtopic
-nounString = "edelman krijgsman landman raadsman weidman";
-nouns = nounString.split(" ");
-
-nouns.forEach(noun => {
-  irregulars[noun] = noun.replace(/man$/, "lieden");
-});
-
-nounString = "akkerman ambachtsman baggerman  bootsman buitenman burgerman buurman handelsman handwerksman kooiman koopman scheepstimmerman timmerman schieman sjouwerman speelman stadswerkman werkman stuurman tuinman vakman varensman veerman voerman zakenman zeeman zegsman";
-nouns = nounString.split(" ");
-
-nouns.forEach(noun => {
-  irregulars[noun] = [
-    noun.replace(/man$/, "lui"),
-    noun.replace(/man$/, "lieden")
-  ];
-});
-
-nounString = "bewindsman bruggeman cameraman hoofdman leidsman ombudsman staatsman vertrouwensman verzetsman voorman";
-nouns = nounString.split(" ");
-nouns.forEach(noun => {
-  irregulars[noun] = [
-    noun.replace(/man$/, "mannen"),
-    noun.replace(/man$/, "lieden")
-  ];
-});
-
-nounString = "brandweerman kantoorman opperman sportsman vakman";
-nouns = nounString.split(" ");
-nouns.forEach(noun => {
-  irregulars[noun] = [
-    noun.replace(/man$/, "mannen"),
-    noun.replace(/man$/, "lieden"),
-    noun.replace(/man$/, "lui")
-  ];
-});
-
-nounString = "barman bosjesman boeman dronkeman ijscoman jongeman kiesman kikvorsman krantenman leenman medicijnman melkman muzelman Noorman olieman onderwijsman orgelman partijman politieman sandwichman schillenman spoorwegman stroman stuntman vakbondsman vuilnisman weerman wetenschapsman wildeman";
-nouns = nounString.split(" ");
-nouns.forEach(noun => {
-  irregulars[noun] = noun.replace(/man$/, "mannen");
-});
-
-let data = JSON.stringify(irregulars);
-fs.writeFile(path.join(__dirname, outputFile), data, err => {
-  console.log("done");
-});
diff --git a/vocab/.custom/language-helpers.js b/vocab/.custom/language-helpers.js
deleted file mode 100644
index c23a80b..0000000
--- a/vocab/.custom/language-helpers.js
+++ /dev/null
@@ -1,45 +0,0 @@
-var fs = require("fs");
-let path = require("path");
-var pluralsFile = "../experimenteel/nouns-meervouden.txt";
-
-var plurals = fs.readFileSync(path.join(__dirname, pluralsFile), "utf8").toString().split("\n");
-
-exports.isVowel = character => {
-  return character.match(/[aeiou]/);
-};
-
-exports.isConsonant = character => {
-  return character.match(/[bcdfghjklmnpqrstvwxyz]/);
-};
-
-exports.endsWithVowel = word => {
-  return word.match(/\w*[aeiou]\b/);
-};
-
-exports.endsWithConsonant = word => {
-  return word.match(/\w*[bcdfghjklmnpqrstvwxyz]\b/);
-};
-
-exports.endsWithDoubleE = word => {
-  return word.match(/\w*ee\b/);
-};
-
-exports.endsWithDoubleConsonant = word => {
-  return word.match(/\w*[bcdfghjklmnpqrstvwxyz][bcdfghjklmnpqrstvwxyz]\b/);
-};
-
-exports.endsWithSingleConsonant = word => {
-  return word.match(/\w*[aeiou][bcdfghjklmnpqrstvwxyz]\b/);
-};
-
-exports.endswithStemloosVowel = word => {
-  return word.match(/\w*[aeiou][aeiou][tkfschp]\b/);
-};
-
-exports.endswithStemloos = word => {
-  return word.match(/\w*[bcdfghjklmnpqrstvwxyz][tkfschp]\b/);
-};
-
-exports.doesPluralExists = plural => {
-  return plurals.includes(plural);
-};