training-data/FONTS.md

Published copy. This file is the release copy of data/FONTS.md from https://github.com/naeyn/de-htr-web. Paths to files that ship in this release have been rewritten to their locations here (training-data/…). Any other repository-relative path — src/…, scripts/…, DECISIONS.md, the raw corpora, the font .ttf files, and data/german_wikipedia_lines.txt — refers to the source repository, which is the only place those files exist.

Handwriting fonts for synthetic training data

These fonts are used to render German text for synthetic training data (Tier 3). Every font listed below was individually verified for:

1. License — SIL Open Font License 1.1 only (sourced from the Google Fonts ofl/ tree). Personal-use-only fonts are categorically rejected.
2. German charset — cmap coverage of Ä Ö Ü ä ö ü ß (U+00C4 U+00D6 U+00DC U+00E4 U+00F6 U+00FC U+00DF) via fontTools.ttLib.TTFont.getBestCmap().

TTF files live in data/fonts/. Matching license texts live in training-data/font-licenses/.

Font	File	Source URL	License	License file	German glyphs verified (method: fontTools cmap check)	Access date
Caveat	Caveat[wght].ttf	https://github.com/google/fonts/raw/main/ofl/caveat/Caveat%5Bwght%5D.ttf	SIL Open Font License 1.1	training-data/font-licenses/Caveat_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Kalam	Kalam-Regular.ttf	https://github.com/google/fonts/raw/main/ofl/kalam/Kalam-Regular.ttf	SIL Open Font License 1.1	training-data/font-licenses/Kalam_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Patrick Hand	PatrickHand-Regular.ttf	https://github.com/google/fonts/raw/main/ofl/patrickhand/PatrickHand-Regular.ttf	SIL Open Font License 1.1	training-data/font-licenses/Patrick_Hand_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Shadows Into Light	ShadowsIntoLight.ttf	https://github.com/google/fonts/raw/main/ofl/shadowsintolight/ShadowsIntoLight.ttf	SIL Open Font License 1.1	training-data/font-licenses/Shadows_Into_Light_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Shadows Into Light Two	ShadowsIntoLightTwo-Regular.ttf	https://github.com/google/fonts/raw/main/ofl/shadowsintolighttwo/ShadowsIntoLightTwo-Regular.ttf	SIL Open Font License 1.1	training-data/font-licenses/Shadows_Into_Light_Two_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Indie Flower	IndieFlower-Regular.ttf	https://github.com/google/fonts/raw/main/ofl/indieflower/IndieFlower-Regular.ttf	SIL Open Font License 1.1	training-data/font-licenses/Indie_Flower_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Architects Daughter	ArchitectsDaughter-Regular.ttf	https://github.com/google/fonts/raw/main/ofl/architectsdaughter/ArchitectsDaughter-Regular.ttf	SIL Open Font License 1.1	training-data/font-licenses/Architects_Daughter_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Reenie Beanie	ReenieBeanie.ttf	https://github.com/google/fonts/raw/main/ofl/reeniebeanie/ReenieBeanie.ttf	SIL Open Font License 1.1	training-data/font-licenses/Reenie_Beanie_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Gloria Hallelujah	GloriaHallelujah.ttf	https://github.com/google/fonts/raw/main/ofl/gloriahallelujah/GloriaHallelujah.ttf	SIL Open Font License 1.1	training-data/font-licenses/Gloria_Hallelujah_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
La Belle Aurore	LaBelleAurore.ttf	https://github.com/google/fonts/raw/main/ofl/labelleaurore/LaBelleAurore.ttf	SIL Open Font License 1.1	training-data/font-licenses/La_Belle_Aurore_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Waiting for the Sunrise	WaitingfortheSunrise.ttf	https://github.com/google/fonts/raw/main/ofl/waitingforthesunrise/WaitingfortheSunrise.ttf	SIL Open Font License 1.1	training-data/font-licenses/Waiting_for_the_Sunrise_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28
Covered By Your Grace	CoveredByYourGrace.ttf	https://github.com/google/fonts/raw/main/ofl/coveredbyyourgrace/CoveredByYourGrace.ttf	SIL Open Font License 1.1	training-data/font-licenses/Covered_By_Your_Grace_OFL.txt	PASS (Ä Ö Ü ä ö ü ß)	2026-07-28

Verification

Command (run from repo root on 2026-07-28):

uv run --with fonttools python -c '
from fontTools.ttLib import TTFont
from pathlib import Path

REQUIRED = {
    0x00C4: "Ä",
    0x00D6: "Ö",
    0x00DC: "Ü",
    0x00E4: "ä",
    0x00F6: "ö",
    0x00FC: "ü",
    0x00DF: "ß",
}

order = [
    "Caveat[wght].ttf",
    "Kalam-Regular.ttf",
    "PatrickHand-Regular.ttf",
    "ShadowsIntoLight.ttf",
    "ShadowsIntoLightTwo-Regular.ttf",
    "IndieFlower-Regular.ttf",
    "ArchitectsDaughter-Regular.ttf",
    "ReenieBeanie.ttf",
    "GloriaHallelujah.ttf",
    "LaBelleAurore.ttf",
    "WaitingfortheSunrise.ttf",
    "CoveredByYourGrace.ttf",
]

for name in order:
    path = Path("data/fonts") / name
    font = TTFont(path)
    cmap = font.getBestCmap() or {}
    cps = set(cmap.keys())
    missing = [f"U+{cp:04X} ({ch})" for cp, ch in REQUIRED.items() if cp not in cps]
    status = "PASS" if not missing else "FAIL"
    miss = ", ".join(missing) if missing else "(none)"
    print(f"{status}\t{path.name}\tmissing={miss}")
'

Output:

PASS	Caveat[wght].ttf	missing=(none)
PASS	Kalam-Regular.ttf	missing=(none)
PASS	PatrickHand-Regular.ttf	missing=(none)
PASS	ShadowsIntoLight.ttf	missing=(none)
PASS	ShadowsIntoLightTwo-Regular.ttf	missing=(none)
PASS	IndieFlower-Regular.ttf	missing=(none)
PASS	ArchitectsDaughter-Regular.ttf	missing=(none)
PASS	ReenieBeanie.ttf	missing=(none)
PASS	GloriaHallelujah.ttf	missing=(none)
PASS	LaBelleAurore.ttf	missing=(none)
PASS	WaitingfortheSunrise.ttf	missing=(none)
PASS	CoveredByYourGrace.ttf	missing=(none)

Rejected candidates

Candidate	Reason
Homemade Apple	Not SIL OFL 1.1 — lives under apache/homemadeapple in google/fonts (Apache 2.0)
Rock Salt	Not SIL OFL 1.1 — lives under apache/rocksalt in google/fonts (Apache 2.0)

Additional OFL handwriting candidates that also PASSed the German cmap check but were not needed after the first 12 accepted fonts: Neucha, Bad Script, Marck Script, Sue Ellen Francisco.