Being hopelessly anglo, I can't help you with translations, but here are some corrections for the English file:
  504, "Also know as{IFCTRL}:" --> "Also 
known as{IFCTRL}:"
  511, "Aditional Rating{IFCTRL}:" --> "
Additional Rating{IFCTRL}:"
  512, "Aditional Rating Name" -->  "
Additional Rating Name"
  856, "Put at the begining of the title" --> "Put at the 
beginning of the title"
  881, "(Warning these changes can not be undone easily)" -->  "(
Warning: These changes can not be undone easily)"
1037, "Series with expisodes" -->  "Series with 
episodes"
1043, "Selected Series with expisodes" -->  "Selected 
series with 
episodes"
1453, "Aditional Information" -->  "
Additional Information"
1908, "An Error occured while connecting to the server.#13%s" -->  "An Error 
occurred...
1914, "An Error occured while getting file information.#13%s" -->  "An Error 
occurred...
1918, "An Error is occured while saving data.#13%s" -->  "An Error is 
occurred...
1919, "...Are you shure you want to proceed?" -->  ...Are you 
sure you want to proceed?"
1927, "...The file %s already exsists." -->  ...The file %s already 
exists."
2462, "Tommorow" -->  "
Tomorrow"
And while I'm at it, a suggestion... There's nothing wrong with the filters menu, but I find it helps if it is as simple and logical as possible. Following is an excerpt from my custom language file. By naming each filter group in the form "All—Attribute—Not attribute," it's much easier to take in the status of all filters at a glance, and still understand from the position/context what each one means.
 402, "&All"
 403, "&Not viewed"
 404, "&Viewed"
 405, "All"
 406, "Owned"
 407, "Not owned" (i.e., on wish list)
 408, "All"
 409, "Loaned"
 410, "Not loaned"
 411, "All"
 412, "Online"
 413, "Not online"
 414, "All"
 415, "Bookmarked"
 416, "Not bookmarked"
 417, "All"
 418, "Movies"
 419, "Series"
 431, "No poster"
 432, "No photo"
 433, "No cover"
 434, "No screenshot"
 430, "Advanced filters"
 435, "All"
 436, "Visible"
 437, "Not visible"
Users, of course, can have it their own way by using a custom language file, as described here: 
http://www.videodb.info/forum_en/index.php?topic=763.0