We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
remove translations for user kinds on backend
### Observed behavior

In role kinds we use the string "Classroom Assignable Coach": https://github.com/learningequality/kolibri/blob/develop/kolibri/auth/constants/role_kinds.py#L15

This string is not something that should be user-facing

### Expected behavior

implementation details hidden from user

### User-facing consequences

confusing, inconsistent terminology


### Context

https://crowdin.com/translate/kolibri/498/en-es#37506



--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `kolibri/auth/constants/role_kinds.py`
Content:
```
1 """
2 This module contains constants representing the kinds of "roles" that a user can have with respect to a Collection.
3 """
4 from __future__ import unicode_literals
5 
6 from django.utils.translation import ugettext_lazy as _
7 
8 ADMIN = "admin"
9 COACH = "coach"
10 ASSIGNABLE_COACH = "classroom assignable coach"
11 
12 choices = (
13     (ADMIN, _("Admin")),
14     (COACH, _("Coach")),
15     (ASSIGNABLE_COACH, _("Classroom Assignable Coach")),
16 )
17
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/kolibri/auth/constants/role_kinds.py b/kolibri/auth/constants/role_kinds.py
--- a/kolibri/auth/constants/role_kinds.py
+++ b/kolibri/auth/constants/role_kinds.py
@@ -3,14 +3,12 @@
 """
 from __future__ import unicode_literals
 
-from django.utils.translation import ugettext_lazy as _
-
 ADMIN = "admin"
 COACH = "coach"
 ASSIGNABLE_COACH = "classroom assignable coach"
 
 choices = (
-    (ADMIN, _("Admin")),
-    (COACH, _("Coach")),
-    (ASSIGNABLE_COACH, _("Classroom Assignable Coach")),
+    (ADMIN, "Admin"),
+    (COACH, "Coach"),
+    (ASSIGNABLE_COACH, "Classroom Assignable Coach"),
 )

{"golden_diff": "diff --git a/kolibri/auth/constants/role_kinds.py b/kolibri/auth/constants/role_kinds.py\n--- a/kolibri/auth/constants/role_kinds.py\n+++ b/kolibri/auth/constants/role_kinds.py\n@@ -3,14 +3,12 @@\n \"\"\"\n from __future__ import unicode_literals\n \n-from django.utils.translation import ugettext_lazy as _\n-\n ADMIN = \"admin\"\n COACH = \"coach\"\n ASSIGNABLE_COACH = \"classroom assignable coach\"\n \n choices = (\n-    (ADMIN, _(\"Admin\")),\n-    (COACH, _(\"Coach\")),\n-    (ASSIGNABLE_COACH, _(\"Classroom Assignable Coach\")),\n+    (ADMIN, \"Admin\"),\n+    (COACH, \"Coach\"),\n+    (ASSIGNABLE_COACH, \"Classroom Assignable Coach\"),\n )\n", "issue": "remove translations for user kinds on backend\n### Observed behavior\r\n\r\nIn role kinds we use the string \"Classroom Assignable Coach\": https://github.com/learningequality/kolibri/blob/develop/kolibri/auth/constants/role_kinds.py#L15\r\n\r\nThis string is not something that should be user-facing\r\n\r\n### Expected behavior\r\n\r\nimplementation details hidden from user\r\n\r\n### User-facing consequences\r\n\r\nconfusing, inconsistent terminology\r\n\r\n\r\n### Context\r\n\r\nhttps://crowdin.com/translate/kolibri/498/en-es#37506\r\n\r\n\n", "before_files": [{"content": "\"\"\"\nThis module contains constants representing the kinds of \"roles\" that a user can have with respect to a Collection.\n\"\"\"\nfrom __future__ import unicode_literals\n\nfrom django.utils.translation import ugettext_lazy as _\n\nADMIN = \"admin\"\nCOACH = \"coach\"\nASSIGNABLE_COACH = \"classroom assignable coach\"\n\nchoices = (\n    (ADMIN, _(\"Admin\")),\n    (COACH, _(\"Coach\")),\n    (ASSIGNABLE_COACH, _(\"Classroom Assignable Coach\")),\n)\n", "path": "kolibri/auth/constants/role_kinds.py"}], "after_files": [{"content": "\"\"\"\nThis module contains constants representing the kinds of \"roles\" that a user can have with respect to a Collection.\n\"\"\"\nfrom __future__ import unicode_literals\n\nADMIN = \"admin\"\nCOACH = \"coach\"\nASSIGNABLE_COACH = \"classroom assignable coach\"\n\nchoices = (\n    (ADMIN, \"Admin\"),\n    (COACH, \"Coach\"),\n    (ASSIGNABLE_COACH, \"Classroom Assignable Coach\"),\n)\n", "path": "kolibri/auth/constants/role_kinds.py"}]}