Hello
Sorry for this late reply.
If your problem is not overcame yet, it could be a problem of bad installation and especially a bad systel.ini.
In fact, in systel.ini, you can choose the language you want to use with the keyword LNGTEL (for Telemac2d) which has to be 1 for French and 2 for english.
If your systel.ini is well written, you need to load it by typing the command cfgmak an then it will run properly (providing that you have proceeded to a proper installation procedure like the one given on the web site).
I hope that this helpful.
Riadh Ata