(In reply to Thomas D. from comment #0) > STR > > 0 default spell check language set to EN in Options > composition; install > DE-DE dictionary (e.g. right-click on composition msg body > languages > add > dictionaries) > > 1 compose email msg, for demonstration with DE and EN language text > subject: Hello World - Hallo zusammen > body: This is English with - Das ist Deutsch > > 2 place focus in body (because spelling button is wrongly disabled in > subject, unrecorded bug, the other half of bug 368915) > > 3 click "Spelling" button > > 4 change dictionary from English/Untited States to German/Germany and watch > inline spelling change in background > > 5 optionally click any button like recheck, ignore, replace to confirm that > you're actually using the new dictionary (but this shouldn't be necessary) > > 6 Verify and remember which language you have chosen (DE) and then click > "close" button in spelling dialogue > > 7 Look at inline spelling marks, and verify current language from dual > spelling button > > Actual result > > 4) when changing dictionary, inline spelling is updated as long as spell > dialogue is open (to DE) > 7) but after closing the dialogue, it reverts back to the original language > setting which was EN > > Expected result > > 7) Chosing another dictionary in spell dialogue must be persisted after > closing the dialogue (with or without further action) > > (Also, it looks like another bug, probably in editor's spell-check dialogue, > that TB immediately applies the new language to the text in background but > DOES NOT update the list of suggestions *in* the dialogue to the new > language - this should be synchronized somehow)

[Approval Request Comment] Regression caused by (bug #): bug 967494 User impact if declined: Changing dictionary language from spellcheck dialogue is not persisted after closing the dialogue Testing completed (on m-c, etc.): Tested on Thunderbird esr38 Risk to taking this patch (and alternatives if risky): low risk bug fix. String changes made by this patch: none