A very wise old eagle once said to me
" You should always be nice to your F/O for two reasons ...
1/ Because one day he might be your check captain.
2/ Because one day you might want him to lie through his teeth for you "
The same gentleman said
" Son, it matters not which in which country you night stop. You only need to learn three phrases of the local language."
" Two beers ... a woman ... my friend will pay "
Great advice ... thanks CS