diff --git a/srcs/compose/fn.json b/srcs/compose/fn.json
new file mode 100644
index 0000000..5a977ba
--- /dev/null
+++ b/srcs/compose/fn.json
@@ -0,0 +1,182 @@
+{
+  "1": "f1",
+  "2": "f2",
+  "3": "f3",
+  "4": "f4",
+  "5": "f5",
+  "6": "f6",
+  "7": "f7",
+  "8": "f8",
+  "9": "f9",
+  "0": "f10",
+  "<": "«",
+  ">": "»",
+  "{": "‹",
+  "}": "›",
+  "[": "‘",
+  "]": "’",
+  "(": "“",
+  ")": "”",
+  "'": "‚",
+  "\"": "„",
+  "-": "–",
+  "_": "—",
+  "^": "¬",
+  "%": "‰",
+  "=": "≈",
+  "u": "µ",
+  "a": "æ",
+  "o": "œ",
+  "*": "°",
+  ".": "…",
+  ",": "·",
+  "!": "¡",
+  "?": "¿",
+  "|": "¦",
+  "§": "¶",
+  "†": "‡",
+  "×": "∙",
+  " ": "nbsp",
+  // arrows
+  "↖": "⇖",
+  "↑": "⇑",
+  "↗": "⇗",
+  "←": "⇐",
+  "→": "⇒",
+  "↙": "⇙",
+  "↓": "⇓",
+  "↘": "⇘",
+  "↔": "⇔",
+  "↕": "⇕",
+  // Currency symbols
+  "e": "€",
+  "l": "£",
+  "r": "₹",
+  "y": "¥",
+  "c": "¢",
+  "p": "₽",
+  "b": "₱",
+  "h": "₴",
+  "z": "₿",
+  // avoid showing these twice
+  "€": "removed",
+  "£": "removed",
+  // alternative greek letters
+  "π": "ϖ",
+  "θ": "ϑ",
+  "Θ": "ϴ",
+  "ε": "ϵ",
+  "β": "ϐ",
+  "ρ": "ϱ",
+  "σ": "ς",
+  "γ": "ɣ",
+  "φ": "ϕ",
+  "υ": "ϒ",
+  "κ": "ϰ",
+  // alternative math characters
+  "∪": "⋃",
+  "∩": "⋂",
+  "∃": "∄",
+  "∈": "∉",
+  "∫": "∮",
+  "Π": "∏",
+  "Σ": "∑",
+  "∨": "⋁",
+  "∧": "⋀",
+  "⊷": "⊶",
+  "⊂": "⊆",
+  "⊃": "⊇",
+  "±": "∓",
+  // hebrew niqqud
+  "ק": "qamats", // kamatz
+  "ר": "hataf_qamats", // reduced kamatz
+  "ו": "holam",
+  "ם": "rafe",
+  "פ": "patah", // patach
+  "ש": "sheva",
+  "ד": "dagesh", // or mapiq
+  "ח": "hiriq",
+  "ף": "hataf_patah", // reduced patach
+  "ז": "qubuts", // kubuts
+  "ס": "segol",
+  "ב": "hataf_segol", // reduced segol
+  "צ": "tsere",
+  // Devanagari symbols
+  "ए": "ऍ",
+  "े": "ॅ",
+  "ऐ": "ऎ",
+  "ै": "ॆ",
+  "ऋ": "ॠ",
+  "ृ": "ॄ",
+  "ळ": "ऴ",
+  "र": "ऱ",
+  "क": "क़",
+  "ख": "ख़",
+  "ग": "ग़",
+  "घ": "ॻ",
+  "ढ": "ढ़",
+  "न": "ऩ",
+  "ड": "ड़",
+  "ट": "ॸ",
+  "ण": "ॾ",
+  "फ": "फ़",
+  "ऌ": "ॡ",
+  "ॢ": "ॣ",
+  "औ": "ॵ",
+  "ौ": "ॏ",
+  "ओ": "ऒ",
+  "ो": "ॊ",
+  "च": "ॼ",
+  "ज": "ज़",
+  "ब": "ॿ",
+  "व": "ॺ",
+  "य": "य़",
+  "अ": "ॲ",
+  "आ": "ऑ",
+  "ा": "ॉ",
+  "झ": "ॹ",
+  "ई": "ॴ",
+  "ी": "ऻ",
+  "इ": "ॳ",
+  "ि": "ऺ",
+  "उ": "ॶ",
+  "ऊ": "ॷ",
+  "ु": "ऄ",
+  "ष": "क्ष",
+  "थ": "त्र",
+  "द": "द्र",
+  "प": "प्र",
+  "श": "श्र",
+  "छ": "श्च",
+  "ँ": "ऀ",
+  "₹": "₨",
+  "ॖ": "ॗ",
+  "॓": "॔",
+  "॰": "ॱ",
+  "।": "॥",
+  "ं": "ॕ",
+  "़": "ॎ",
+  "ऽ": "ॽ",
+  // Persian numbers
+  "۱": "f1",
+  "۲": "f2",
+  "۳": "f3",
+  "۴": "f4",
+  "۵": "f5",
+  "۶": "f6",
+  "۷": "f7",
+  "۸": "f8",
+  "۹": "f9",
+  // Arabic numbers
+  "۰": "f10",
+  "١": "f1",
+  "٢": "f2",
+  "٣": "f3",
+  "٤": "f4",
+  "٥": "f5",
+  "٦": "f6",
+  "٧": "f7",
+  "٨": "f8",
+  "٩": "f9",
+  "٠": "f10"
+}
diff --git a/srcs/juloo.keyboard2/ComposeKeyData.java b/srcs/juloo.keyboard2/ComposeKeyData.java
index dd24192..9994e51 100644
Binary files a/srcs/juloo.keyboard2/ComposeKeyData.java and b/srcs/juloo.keyboard2/ComposeKeyData.java differ
diff --git a/srcs/juloo.keyboard2/KeyModifier.java b/srcs/juloo.keyboard2/KeyModifier.java
index 5763e99..d8ea965 100644
--- a/srcs/juloo.keyboard2/KeyModifier.java
+++ b/srcs/juloo.keyboard2/KeyModifier.java
@@ -204,7 +204,9 @@ public final class KeyModifier
     String name = null;
     switch (k.getKind())
     {
-      case Char: name = apply_fn_char(k.getChar()); break;
+      case Char:
+        KeyValue r = ComposeKey.apply(ComposeKeyData.fn, k.getChar());
+        return (r != null) ? r : k;
       case Keyevent: name = apply_fn_keyevent(k.getKeyevent()); break;
       case Event: name = apply_fn_event(k.getEvent()); break;
       case Placeholder: name = apply_fn_placeholder(k.getPlaceholder()); break;
@@ -264,193 +266,6 @@ public final class KeyModifier
     }
   }
 
-  /** Return the name of modified key, or [null]. */
-  private static String apply_fn_char(char c)
-  {
-    switch (c)
-    {
-      case '1': return "f1";
-      case '2': return "f2";
-      case '3': return "f3";
-      case '4': return "f4";
-      case '5': return "f5";
-      case '6': return "f6";
-      case '7': return "f7";
-      case '8': return "f8";
-      case '9': return "f9";
-      case '0': return "f10";
-      case '<': return "«";
-      case '>': return "»";
-      case '{': return "‹";
-      case '}': return "›";
-      case '[': return "‘";
-      case ']': return "’";
-      case '(': return "“";
-      case ')': return "”";
-      case '\'': return "‚";
-      case '"': return "„";
-      case '-': return "–";
-      case '_': return "—";
-      case '^': return "¬";
-      case '%': return "‰";
-      case '=': return "≈";
-      case 'u': return "µ";
-      case 'a': return "æ";
-      case 'o': return "œ";
-      case '*': return "°";
-      case '.': return "…";
-      case ',': return "·";
-      case '!': return "¡";
-      case '?': return "¿";
-      case '|': return "¦";
-      case '§': return "¶";
-      case '†': return "‡";
-      case '×': return "∙";
-      case ' ': return "nbsp";
-      // arrows
-      case '↖': return "⇖";
-      case '↑': return "⇑";
-      case '↗': return "⇗";
-      case '←': return "⇐";
-      case '→': return "⇒";
-      case '↙': return "⇙";
-      case '↓': return "⇓";
-      case '↘': return "⇘";
-      case '↔': return "⇔";
-      case '↕': return "⇕";
-      // Currency symbols
-      case 'e': return "€";
-      case 'l': return "£";
-      case 'r': return "₹";
-      case 'y': return "¥";
-      case 'c': return "¢";
-      case 'p': return "₽";
-      case 'b': return "₱";
-      case 'h': return "₴";
-      case 'z': return "₿";
-      case '€': case '£': return "removed"; // Avoid showing these twice
-      // alternating greek letters
-      case 'π': return "ϖ";
-      case 'θ': return "ϑ";
-      case 'Θ': return "ϴ";
-      case 'ε': return "ϵ";
-      case 'β': return "ϐ";
-      case 'ρ': return "ϱ";
-      case 'σ': return "ς";
-      case 'γ': return "ɣ";
-      case 'φ': return "ϕ";
-      case 'υ': return "ϒ";
-      case 'κ': return "ϰ";
-      // alternating math characters
-      case '∪': return "⋃";
-      case '∩': return "⋂";
-      case '∃': return "∄";
-      case '∈': return "∉";
-      case '∫': return "∮";
-      case 'Π': return "∏";
-      case 'Σ': return "∑";
-      case '∨': return "⋁";
-      case '∧': return "⋀";
-      case '⊷': return "⊶";
-      case '⊂': return "⊆";
-      case '⊃': return "⊇";
-      case '±': return "∓";
-      // hebrew niqqud
-      case 'ק': return "qamats"; // kamatz
-      case 'ר': return "hataf_qamats"; // reduced kamatz
-      case 'ו': return "holam";
-      case 'ם': return "rafe";
-      case 'פ': return "patah"; // patach
-      case 'ש': return "sheva";
-      case 'ד': return "dagesh"; // or mapiq
-      case 'ח': return "hiriq";
-      case 'ף': return "hataf_patah"; // reduced patach
-      case 'ז': return "qubuts"; // kubuts
-      case 'ס': return "segol";
-      case 'ב': return "hataf_segol"; // reduced segol
-      case 'צ': return "tsere";
-      // Devanagari symbols
-      case 'ए': return "ऍ";
-      case 'े': return "ॅ";
-      case 'ऐ': return "ऎ";
-      case 'ै': return "ॆ";
-      case 'ऋ': return "ॠ";
-      case 'ृ': return "ॄ";
-      case 'ळ': return "ऴ";
-      case 'र': return "ऱ";
-      case 'क': return "क़";
-      case 'ख': return "ख़";
-      case 'ग': return "ग़";
-      case 'घ': return "ॻ";
-      case 'ढ': return "ढ़";
-      case 'न': return "ऩ";
-      case 'ड': return "ड़";
-      case 'ट': return "ॸ";
-      case 'ण': return "ॾ";
-      case 'फ': return "फ़";
-      case 'ऌ': return "ॡ";
-      case 'ॢ': return "ॣ";
-      case 'औ': return "ॵ";
-      case 'ौ': return "ॏ";
-      case 'ओ': return "ऒ";
-      case 'ो': return "ॊ";
-      case 'च': return "ॼ";
-      case 'ज': return "ज़";
-      case 'ब': return "ॿ";
-      case 'व': return "ॺ";
-      case 'य': return "य़";
-      case 'अ': return "ॲ";
-      case 'आ': return "ऑ";
-      case 'ा': return "ॉ";
-      case 'झ': return "ॹ";
-      case 'ई': return "ॴ";
-      case 'ी': return "ऻ";
-      case 'इ': return "ॳ";
-      case 'ि': return "ऺ";
-      case 'उ': return "ॶ";
-      case 'ऊ': return "ॷ";
-      case 'ु': return "ऄ";
-      case 'ष': return "क्ष";
-      case 'थ': return "त्र";
-      case 'द': return "द्र";
-      case 'प': return "प्र";
-      case 'श': return "श्र";
-      case 'छ': return "श्च";
-      case 'ँ': return "ऀ";
-      case '₹': return "₨";
-      case 'ॖ': return "ॗ";
-      case '॓': return "॔";
-      case '॰': return "ॱ";
-      case '।': return "॥";
-      case 'ं': return "ॕ";
-      case '़': return "ॎ";
-      case 'ऽ': return "ॽ";
-      // Persian numbers
-      case '۱': return "f1";
-      case '۲': return "f2";
-      case '۳': return "f3";
-      case '۴': return "f4";
-      case '۵': return "f5";
-      case '۶': return "f6";
-      case '۷': return "f7";
-      case '۸': return "f8";
-      case '۹': return "f9";
-      case '۰': return "f10";
-      // Arabic numbers
-      case '١': return "f1";
-      case '٢': return "f2";
-      case '٣': return "f3";
-      case '٤': return "f4";
-      case '٥': return "f5";
-      case '٦': return "f6";
-      case '٧': return "f7";
-      case '٨': return "f8";
-      case '٩': return "f9";
-      case '٠': return "f10";
-      default: return null;
-    }
-  }
-
   private static KeyValue apply_ctrl(KeyValue k)
   {
     if (_modmap != null)