checklang.py

import re
from pathlib import Path
from langdetect import detect

p = Path("/tmp/f/fish-shell/po/")
pattern = re.compile('^msgstr\s*"(.{10,})"')
for pofile in list(p.glob('*.po')):
    language = []
    with open(pofile) as f:
        po_data = f.readlines()
    for line in po_data:
        if m := pattern.match(line):
            language.append(detect(m.group(1)))
    if language:
        result = max(set(language), key=language.count)
    else:
        result = "No translations or languages detected!"
    print(f"{pofile}: {result}")