I wrote English to keep the title short. If you're living in a country where the main language is not your mother-tongue, have you noticed your accent changing or do you find yourself transferring grammar forms from another language onto your mother-tongue?
Last time I was in the UK, a man I chatted to said he'd thought I was Scandinavian. Think I will have to tape myself and see what I sound like this days!
What sort of accent do your children have in English? Is it similar to your own? I know some British families here whose children have a fairly American accent, although it is a bit mixed. They attend international schools and many of their teachers learnt American English.