Steps to reproduce:

1. Change NVDA language to aragonese.
2. Open Notepad.
3. Type one or two lines of text.
4. Try navigating by word (control+left or right arrows) or by character (left and right arrows).

Actual behavior:

NVDA does not read anything.

Expected behavior:

NVDA should read previous / next character or word, as it does in other languages.

System configuration

NVDA installed/portable/running from source:

Installed and portable.

NVDA version:

2020.1

Windows version:

Windows 10 version 1909

Name and version of other software in use when reproducing the issue:

This issue also affects some system dialogs, Mozilla Firefox and the Windows console with UIA experimental support disabled.

Other information about your system:

Relevant log fragment:

error executing script: <bound method EditableText.script_caret_moveByWord of <NVDAObjects.Dynamic_IAccessibleEditWindowNVDAObjectEditableIndentNav object at 0x047237D0>> with gesture 'ctrl+flecha dreita'
Traceback (most recent call last):
  File "scriptHandler.pyc", line 205, in executeScript
  File "editableText.pyc", line 226, in script_caret_moveByWord
  File "editableText.pyc", line 164, in _caretMovementScriptHelper
  File "NVDAObjects\behaviors.pyc", line 175, in _caretScriptPostMovedHelper
  File "editableText.pyc", line 149, in _caretScriptPostMovedHelper
  File "textInfos\offsets.pyc", line 506, in expand
  File "textInfos\offsets.pyc", line 485, in _getUnitOffsets
  File "NVDAObjects\window\edit.pyc", line 418, in _getWordOffsets
  File "textInfos\offsets.pyc", line 366, in _getWordOffsets
  File "locale.pyc", line 591, in getlocale
  File "locale.pyc", line 499, in _parse_localename
ValueError: unknown locale: an

Other questions

Does the issue still occur after restarting your computer?

Yes.

Have you tried any other versions of NVDA? If so, please report their behaviors.

2019.2 works as expected. The problem starts in 2019.3.

If addons are disabled, is your problem still occuring?

Yes.

Did you try to run the COM registry fixing tool in NVDA menu / tools?

Yes.