[TxMt] Dictionary choice in textmate

[David Stickland]

I can't seem to find where the dictionary is specified in text mate?
I am using it for Latex and in the installation on my portable Mac 
spell checking (in US English) works,
but the, as far as I can tell identical, installation on my desktop Mac 
I do not get misspelled words high-lighted, but right clicking on a the 
misspelled word offers me the suggested better spellings

How could I specify sometimes a different dictionary (Uk English, 
French) Mail knows about the different dictionaries....??