OK, you're right, the problems came from this typo. Everything is fine, now (I did modified manually the ~/.pam_environment because the language selection at the session opening did not correct it once - I don't know why it works now).
I just insist on the fact that a write-protected ~/.pam_environment does not break anything: it is modified whatsoever (I will try it again, but I am quite confident on it).
And I still have to select the correct language at connection, it is not kept from one session to the next.
OK, you're right, the problems came from this typo. Everything is fine, now (I did modified manually the ~/.pam_environment because the language selection at the session opening did not correct it once - I don't know why it works now).
I just insist on the fact that a write-protected ~/.pam_environment does not break anything: it is modified whatsoever (I will try it again, but I am quite confident on it).
And I still have to select the correct language at connection, it is not kept from one session to the next.