Czech, Croatian, Indonesian, Italian, Polish, Portuguese and Spanish began
their spelling checks with the same thirteen lines, byte for byte: no
dictionary means no marks, single letters and words without letters pass,
words with digits and short words in capitals pass when the File › Options
› Proofing choices say so, and words in another script pass. Each also had
its own copy of the Latin-script test. These were the lines storytold/wordcraft#3966 had to fix
in six copies one by one, and where the Russian and Turkish copies stayed
wrong until the first commit here.
spelling.rs has them once (`word_to_check`), and each language goes on
from there with its own rules (Polish apostrophe endings, Italian elisions,
Indonesian clitics, Uruguayan `vos` forms).
Tests: words_needing_no_lookup. Ignoring the uppercase option there fails
it and all seven languages' proofing-options tests. Proof: 286 tests.