Theres no translations in a worth bothering with state (that means full names, menus, items basically everything but dialogue) to be honest. Part of it is due to the script engine of this game being a work of evil but its mostly the no translator problem.
You've got
this one which has some potential but for now don't bother. What isn't mentioned there is the fact shops plain don't work. I can't remmeber if they crash the game. It is thought it is due to the double lines thing that the aptch relies so much on...
Theres
this one which is dead but was okay for what it was but not far enough in any field to bother with.
And there is AniMarths patch (which is also dead) which I don't know where its gone but again was okay for what it did but not far enough in any field to bother. It might be slightly better than the Gaijin Productions one.
Personally I'd just play book 1 of FE3. FE1 is a bit of an inbalanced version of it but with a couple more maps and characters.