Phase 2A languages are languages which:

• Don't use LanguageConverter::guessVariant() (srwiki is the only user of this function)
• Don't (heavily) use inline rules
• Don't use custom rules sourced from article space
• Performance/scalability is not a concern (crhwiki may fall afoul)

Production use requires zero (or very-near-zero) diffs with PHP output for content on wikis using these languages, as determined by round-trip testing.

The language set for this will probably grow with time, as I validate additional zero-difference languages. Currently it is:

• crhwiki
• kuwiki
• enwiki (for testing with pig latin in beta, only)