- translations/th.csv: custom field labels, messages, print format and
letter head text, the 22 Tax Withholding Category names; overrides the
upstream Thai for the standard labels the print formats show
- print formats embed Sarabun (public/fonts, OFL) so PDFs render Thai on
servers without a Thai font
- letter head labels go through _()
- withholding row description is translated when stored
- in_words: Thai "...บาทถ้วน" wording via num2words when the language is
Thai (ThaiSalesInvoice.set_total_in_words); print formats re-derive it
in the print language (get_in_words)
- fixture `modified` bumped so migrate re-imports the changed documents