diff --git a/Makefile.in b/Makefile.in
index 1401531a..e4a9c952 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -818,17 +818,17 @@ $(simsun.ttc): $(simsun.ttf) $(nsimsun.ttf)
 $(msgothic.ttc): $(msgothic.ttf) $(mspgothic.ttf) $(msuigothic.ttf)
 	afdko otf2otc -o $@ $^
 
-$(micross.ttf): $(noto_sans.ttf) $(noto_sans_arabic.ttf) $(noto_sans_armenian.ttf) $(noto_sans_bengali.ttf) $(noto_sans_coptic.ttf) \
+$(micross.ttf): $(FONTS)/scripts/merge.py $(noto_sans.ttf) $(noto_sans_arabic.ttf) $(noto_sans_armenian.ttf) $(noto_sans_bengali.ttf) $(noto_sans_coptic.ttf) \
 		$(noto_sans_georgian.ttf) $(noto_sans_gujarati.ttf) $(noto_sans_hebrew.ttf) $(noto_sans_khmer.ttf) $(noto_sans_tamil.ttf) \
 		$(noto_sans_thaana.ttf) $(noto_sans_thai.ttf)
-	$(FONTFORGE) -script $(MERGEFONTSSCRIPT) $(noto_sans.ttf) $(noto_sans_arabic.ttf) $(noto_sans_armenian.ttf) $(noto_sans_bengali.ttf) \
+	$(FONTS)/scripts/merge.py $(noto_sans.ttf) $(noto_sans_arabic.ttf) $(noto_sans_armenian.ttf) $(noto_sans_bengali.ttf) \
 		$(noto_sans_coptic.ttf) $(noto_sans_georgian.ttf) $(noto_sans_gujarati.ttf) $(noto_sans_hebrew.ttf) $(noto_sans_khmer.ttf) \
 		$(noto_sans_tamil.ttf) $(noto_sans_thaana.ttf) $(noto_sans_thai.ttf) "MicrosoftSansSerif" "Microsoft Sans Serif" "Regular" $(micross.ttf)
 
-$(nirmala.ttf): $(noto_sans.ttf) $(noto_sans_bengaliui.ttf) $(noto_sans_devanagariui.ttf) $(noto_sans_gujaratiui.ttf) $(noto_sans_gurmukhiui.ttf) \
+$(nirmala.ttf): $(FONTS)/scripts/merge.py $(noto_sans.ttf) $(noto_sans_bengaliui.ttf) $(noto_sans_devanagariui.ttf) $(noto_sans_gujaratiui.ttf) $(noto_sans_gurmukhiui.ttf) \
 		$(noto_sans_kannadaui.ttf) $(noto_sans_malayalamui.ttf) $(noto_sans_meeteimayek.ttf) $(noto_sans_olchiki.ttf) $(noto_sans_oriyaui.ttf) \
 		$(noto_sans_sinhalaui.ttf) $(noto_sans_sorasompeng.ttf) $(noto_sans_tamilui.ttf) $(noto_sans_teluguui.ttf)
-	$(FONTFORGE) -script $(MERGEFONTSSCRIPT) $(noto_sans.ttf) $(noto_sans_bengaliui.ttf) $(noto_sans_devanagariui.ttf) $(noto_sans_gujaratiui.ttf) \
+	$(FONTS)/scripts/merge.py $(noto_sans.ttf) $(noto_sans_bengaliui.ttf) $(noto_sans_devanagariui.ttf) $(noto_sans_gujaratiui.ttf) \
 		$(noto_sans_gurmukhiui.ttf) $(noto_sans_kannadaui.ttf) $(noto_sans_malayalamui.ttf) $(noto_sans_meeteimayek.ttf) $(noto_sans_olchiki.ttf) \
 		$(noto_sans_oriyaui.ttf) $(noto_sans_sinhalaui.ttf) $(noto_sans_sorasompeng.ttf) $(noto_sans_tamilui.ttf) $(noto_sans_teluguui.ttf) \
 		"NirmalaUI" "Nirmala UI" "Regular" $(nirmala.ttf)
diff --git a/fonts/scripts/merge.py b/fonts/scripts/merge.py
new file mode 100755
index 00000000..0acb77d2
--- /dev/null
+++ b/fonts/scripts/merge.py
@@ -0,0 +1,250 @@
+#!/usr/bin/env python3
+
+# Based on merge_noto.py and merge_fonts.py from the nototools
+# (https://github.com/googlefonts/nototools), with the following
+# copyright notice:
+
+# Copyright 2014-2017 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The font name changing logic is taken from
+# https://github.com/chrissimpkins/fontname.py/blob/master/fontname.py,
+# with the following copyright notice:
+
+# Copyright 2019 Christopher Simpkins
+# MIT License
+
+"""Merges a number of Noto fonts and then sets a given name to the
+result.
+
+"""
+
+import sys
+import tempfile
+import os
+
+from fontTools import merge
+from fontTools import ttLib
+from fontTools.ttLib.tables import otTables
+
+def read_line_metrics(font):
+    metrics = {
+        "ascent": font["hhea"].ascent,
+        "descent": font["hhea"].descent,
+        "usWinAscent": font["OS/2"].usWinAscent,
+        "usWinDescent": font["OS/2"].usWinDescent,
+        "sTypoAscender": font["OS/2"].sTypoAscender,
+        "sTypoDescender": font["OS/2"].sTypoDescender,
+        "sxHeight": font["OS/2"].sxHeight,
+        "sCapHeight": font["OS/2"].sCapHeight,
+        "sTypoLineGap": font["OS/2"].sTypoLineGap,
+    }
+    return metrics
+
+
+def set_line_metrics(font, metrics):
+    font["hhea"].ascent = metrics["ascent"]
+    font["hhea"].descent = metrics["descent"]
+    font["OS/2"].usWinAscent = metrics["usWinAscent"]
+    font["OS/2"].usWinDescent = metrics["usWinDescent"]
+    font["OS/2"].sTypoAscender = metrics["sTypoAscender"]
+    font["OS/2"].sTypoDescender = metrics["sTypoDescender"]
+    font["OS/2"].sxHeight = metrics["sxHeight"]
+    font["OS/2"].sCapHeight = metrics["sCapHeight"]
+    font["OS/2"].sTypoLineGap = metrics["sTypoLineGap"]
+
+def has_gsub_table(fontfile):
+    font = ttLib.TTFont(fontfile)
+    return "GSUB" in font
+
+SCRIPT_TO_OPENTYPE_SCRIPT_TAG = {
+    # Retrieved from Opentype 1.9 delta specs. Prerelease scripttags used out of necessity. https://docs.microsoft.com/en-us/typography/opentype/spec/scripttags
+    "Carian": "cari",
+    "CypriotSyllabary": "cprt",
+    "CyproMinoan": "cpmn",
+    "Deseret": "dsrt",
+    "Glagolitic": "glag",
+    "EgyptianHieroglyphs": "egyp",
+    "ImperialAramaic": "armi",
+    "LinearA": "lina",
+    "LinearB": "linb",
+    "Lisu": "lisu",
+    "Lycian": "lyci",
+    "Lydian": "lydi",
+    "Ogham": "ogam",
+    "OldItalic": "ital",
+    "OldPersian": "xpeo",
+    "OldSouthArabian": "sarb",
+    "OldTurkic": "orkh",
+    "OldSogdian": "sogo",
+    "OldNorthArabian": "narb",
+    "OldHungarian": "hung",
+    "Osmanya": "osma",
+    "Phoenician": "phnx",
+    "SumeroAkkadianCuneiform": "xsux",
+    "Ugaritic": "ugar",
+    "OlChiki": "olck",
+    "TaiLe": "tale",
+    "Cuneiform": "xsux",
+    "Cypriot": "cprt",
+    "Runic": "runr",
+    "Shavian": "shaw",
+    "Vai": "vai ",
+    "Yi": "yi  ",
+    "AnatolianHieroglyphs": "hluw",
+    "Bamum": "bamu",
+    "ByzantineMusic": "byzm",
+    "Gothic": "goth",
+    "ImperialAramaic": "armi",
+    "InscriptionalPahlavi": "phli",
+    "InscriptionalParthian": "prti",
+    "Khojki": "khoj",
+    "MathematicalAlphanumericSymbols": "math",
+    "MeroiticCursive": "merc",
+    "MeroiticHieroglyphs": "mero",
+    "MusicalSymbols": "musc",
+    "Palmyrene": "palm",
+    "Rejang": "rjng",
+    "Samaritan": "samr",
+    "Carian": "cari",
+    "Ahom": "ahom",
+    "Adlam": "adlm",
+    "Dogra": "dogr",
+    "Lisu": "lisu",
+    "Mandaean": "mand",
+    "Manichaean": "mani",
+    "Tifinagh": "tfng",
+    "Wancho": "wcho",
+    "Yezidi": "yezi",
+    "Cherokee": "cher",
+    "Chorasmian": "chrs",
+    "PahawhHmong": "hmng",
+    "Phagspa": "phag",
+    "Sundanese": "sund",
+    "WarangCiti": "wara",
+    "SylotiNagri": "sylo",
+    "PsalterPahlavi": "phlp",
+    "CaucasianAlbanian": "aghb",
+    "Medefaidrin": "medf",
+    "MeiteiMayek": "mtei",
+    "MendeKikakui": "mend",
+    "Mro": "mroo",
+    "Multani": "mult",
+    "Nabataean": "nbat",
+    "Nandinagari": "nand",
+    "Newa": "newa",
+    "NewTaiLue": "talu",
+    "Nushu": "nshu",
+    "NyiakengPuachueHmong": "hmnp",
+    "OldPermic": "perm",
+    "SoraSompeng": "sora",
+    "Soyombo": "soyo",
+    "SylotiNagri": "sylo",
+    "Tagbanwa": "tagb",
+    "Tagalog": "tglg",
+    "Takri": "takr",
+    "TaiTham": "lana",
+    "TaiViet": "tavt",
+    "Tangut": "tang",
+    "Thaana": "thaa",
+    "UgariticCuneiform": "ugar",
+    "ZanabazarSquare": "zanb",
+    "SignWriting": "sgnw",
+    "OldUyghur": "ougr",
+    "Tangsa": "tnsa",
+    "Toto": "toto",
+    "Vithkuqi": "vith",
+    "Duployan": "dupl",
+    "Hatran": "hatr",
+    # These last two would only merge using the long script name including the 'NotoSerif' part
+    "NotoSerifYezidi": "yezi",
+    "NotoSerifNyiakengPuachueHmong": "hmnp",
+}
+
+def get_opentype_script_tag(fontfile):
+    fontfile = os.path.basename(fontfile)
+    if fontfile.startswith("NotoSans"):
+        fontfile = fontfile[8:]
+    fontfile = fontfile[: fontfile.index("-")]
+    return SCRIPT_TO_OPENTYPE_SCRIPT_TAG[fontfile]
+
+def add_gsub_to_font(fontfile):
+    """Adds an empty GSUB table to a font."""
+    font = ttLib.TTFont(fontfile)
+    gsub_table = ttLib.getTableClass("GSUB")("GSUB")
+    gsub_table.table = otTables.GSUB()
+    gsub_table.table.Version = 1.0
+    gsub_table.table.ScriptList = otTables.ScriptList()
+    gsub_table.table.ScriptCount = 1
+    gsub_table.table.LookupList = otTables.LookupList()
+    gsub_table.table.LookupList.LookupCount = 0
+    gsub_table.table.LookupList.Lookup = []
+    gsub_table.table.FeatureList = otTables.FeatureList()
+    gsub_table.table.FeatureList.FeatureCount = 0
+    gsub_table.table.LookupList.FeatureRecord = []
+
+    script_record = otTables.ScriptRecord()
+    script_record.ScriptTag = get_opentype_script_tag(fontfile)
+    script_record.Script = otTables.Script()
+    script_record.Script.LangSysCount = 0
+    script_record.Script.LangSysRecord = []
+
+    default_lang_sys = otTables.DefaultLangSys()
+    default_lang_sys.FeatureIndex = []
+    default_lang_sys.FeatureCount = 0
+    default_lang_sys.LookupOrder = None
+    default_lang_sys.ReqFeatureIndex = 65535
+    script_record.Script.DefaultLangSys = default_lang_sys
+
+    gsub_table.table.ScriptList.ScriptRecord = [script_record]
+
+    font["GSUB"] = gsub_table
+
+    target_file = tempfile.gettempdir() + "/" + os.path.basename(fontfile)
+    font.save(target_file)
+    return target_file
+
+def main():
+    output_filename = sys.argv[-1]
+    weight = sys.argv[-2]
+    font_name = sys.argv[-3]
+    ps_name = sys.argv[-4]
+    input_filenames = sys.argv[1:-4]
+
+    # Add a GSUB table to the fonts that do not have one
+    for index, filename in enumerate(input_filenames):
+        if not has_gsub_table(filename):
+            input_filenames[index] = add_gsub_to_font(filename)
+
+    # Merge the fonts together
+    merger = merge.Merger()
+    font = merger.merge(input_filenames)
+
+    # Use the line metrics defined by the first font
+    metrics = read_line_metrics(ttLib.TTFont(input_filenames[0]))
+    set_line_metrics(font, metrics)
+
+    # Rename the result
+    for record in font['name'].names:
+        if record.nameID == 1:
+            record.string = font_name
+        elif record.nameID == 4:
+            record.string = "{} {}".format(font_name, weight)
+        elif record.nameID == 6:
+            record.string = "{}-{}".format(ps_name, weight.replace(' ', ''))
+
+    font.save(output_filename)
+
+if __name__ == '__main__':
+    main()
diff --git a/fonts/scripts/mergefonts.pe b/fonts/scripts/mergefonts.pe
deleted file mode 100644
index 500c7380..00000000
--- a/fonts/scripts/mergefonts.pe
+++ /dev/null
@@ -1,29 +0,0 @@
-if ($argc < 6)
-    Error ("Expected arguments - Font1, Font2, Font3, ..., FontName, FullName, FontWeight, OutputFilename")
-endif
-
-FONTNAME = ToString($argv[$argc - 4])
-FULLNAME = ToString($argv[$argc - 3])
-FONTWEIGHT = ToString($argv[$argc - 2])
-SRCFONTNAME = ToString($argv[1])
-DESTFONTNAME = ToString($argv[$argc - 1])
-
-Open(SRCFONTNAME)
-
-i = 2
-while (i < $argc - 4)
-  MergeFonts($argv[i])
-  i = i + 1
-endloop
-
-SetFontNames(FONTNAME, FULLNAME, FULLNAME, FONTWEIGHT, "", "1.0.0")
-Generate(DESTFONTNAME)
-Close()
-
-Open(DESTFONTNAME)
-Reencode("unicode")
-SelectWorthOutputting()
-SelectInvert()
-BuildAccented()
-Generate(DESTFONTNAME)
-Close()