When Vietnamese mode is on, the engine transformed every word including
English (test->tét, cargo->cảgo, status->státu). This wires up the
previously-dead english.rs dictionary and spelling.rs validator so that on
word commit, words that are clearly English or not phonologically valid
Vietnamese are reverted to the raw keystrokes typed. Genuine Vietnamese
(tiếng, việt, quả) is kept. Gated by the existing [auto_restore] enabled
config (default on).
Co-Authored-By: vndangkhoa <vonguyendangkhoa@gmail.com>
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