As a rule ccTLDs should be registered in the local languages. Very common English keywords like 'job' can be valuable.
+1 on this comment
Also, you are unlikely to be able to register a .fr domain without a French address or French citizenship (I know it was only an example, but just a heads-up before you pursue it).
But that's assuming you plan on buying particular ccTLDs for resale, you didn't say whether you plan on selling on these hypothetical domains or developing on them. Whilst I'm with Kate above on the buy-for-resell being a general no, for development it's a whole different game.
If you plan to target ex-pats in foreign countries, I would think that such sites might be good to make on local ccTLDs- but this is not my area of expertise so I would not know. I would assume type-in traffic would be close to nil, so you would need to advertise anyway (which you could do with a usually cheaper .com or .co.uk).
For a quick, easy way of looking at search volume, you can try going to
Google Insights, setting the region as the country you're interested in and entering some English terms to see what comes up.
I entered 'birthday' and 'anniversaire' for France and got
this. It seems that all the recorded searches for 'birthday' were in the term 'Happy Birthday'.
You could try different English language searches on different countries with various potential ex-pat searches and see if anything comes up good...?