Once I have Translatable set up everything on the content side seems to work fine, however when I try to go into security and edit any of the users I get the error:

[User Deprecated] i18n::_t is deprecated. The $priority argument to _t() is deprecated, please use module inclusion priorities instead. Called from _t.

Trace---------
i18n::_t is deprecated. The $priority argument to _t() is deprecated, please use module inclusion priorities instead. Called from _t.
Deprecation.php:155
Deprecation::notice(3.0,The $priority argument to _t() is deprecated, please use module inclusion priorities instead)
i18n.php:1469
i18n::_t(Translatable.TRANSLATEPERMISSION,Translate %s,50,Translate pages into a language)
Core.php:393
_t(Translatable.TRANSLATEPERMISSION,Translate %s,50,Translate pages into a language)
Translatable.php:1302
Translatable->providePermissions()
Permission.php:451
Permission::get_codes(1)
PermissionCheckboxSetField.php:54
PermissionCheckboxSetField->__construct(Permissions,,Permission,GroupID,ManyManyList)
Member.php:1178
Member->getCMSFields()
GridFieldDetailForm.php:315
GridFieldDetailForm_ItemRequest->ItemEditForm(GridField,SS_HTTPRequest)
GridFieldDetailForm.php:254
GridFieldDetailForm_ItemRequest->edit(SS_HTTPRequest)
RequestHandler.php:168
RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
GridFieldDetailForm.php:82
GridFieldDetailForm->handleItem(GridField,SS_HTTPRequest)
GridField.php:644
GridField->handleRequest(SS_HTTPRequest,DataModel)
RequestHandler.php:186
RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
RequestHandler.php:186
RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
Controller.php:149
Controller->handleRequest(SS_HTTPRequest,DataModel)
LeftAndMain.php:340
LeftAndMain->handleRequest(SS_HTTPRequest,DataModel)
AdminRootController.php:88
AdminRootController->handleRequest(SS_HTTPRequest,DataModel)
Director.php:281
Director::handleRequest(SS_HTTPRequest,Session,DataModel)
Director.php:112
Director::direct(/admin/security/EditForm/field/Members/item/2/edit,DataModel)
main.php:126

For now I have just commented out the lines that throw there error and it works fine for now, can't launch the site knowing this though. Any Ideas on what is going on here?

Thanks Willr,

So this issue is within the translatable module. I have done a base install which I have done nothing with other than install the translatable module and I am not sure what to do to fix it.

A new more pressing problem has come up with the module. When I create new pages with the translatable module installed and I tab over where the URL usually changes itself I get:
Error: "Uncaught InvalidArgumentException: Invalid locale "en_US/field/URLSegment/suggest/?value=Remarkable Transformations"" at line 299 of /CMS/translatable/code/model/Translatable.php

If I turn off dev mode just to lose the error I get a URL of undefined. I can manually put in a URL but then when I go the the French side of the site it gives me a weird URL of home-fr-frhome-fr-fr if I try to manually change that it won't let me and will only give a URL at that point of undefinedundefined. I know my way around SS pretty well but fixing this module is a bit above my level.

Do you have any insight into what maybe causing this. I have no problem digging I just don't know where to start. Thanks Willr for your help.

** EDIT ** Searching around I found this https://github.com/silverstripe/silverstripe-translatable/issues/35#issuecomment-7032656. This seems to be the same error I am getting so I will keep on eye on this.

Let's continue this discussion on github:
https://github.com/silverstripe/silverstripe-translatable/issues/35#issuecomment-7032656
One problem per issue in github, please ;)