[Bug 1942774] Re: No fallback English layout on account creation screen during installation. Ubuntu installer won't accept non-Latin characters

[Omer I.S.]

As you can see in the picture, the user cannot proceed with the installation using the Arabic script, and there is no way to switch to the English keyboard layout without giving up of adding the Arabic one during the installation.
Some non-Latin keyboard layouts (such as Hebrew and Georgian) allow typing Latin capital letters using CapsLock, but the most of them don't.

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https://bugs.launchpad.net/bugs/1942774

Title:
  No fallback English layout on account creation screen during
  installation. Ubuntu installer won't accept non-Latin characters

Status in subiquity:
  Triaged
Status in ubuntu-desktop-installer:
  Won't Fix
Status in ubuntu-desktop-provision:
  New
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  Update: still reproducible in Resolute Racoon daily. (Edited by
  someone else than the original bug reporter)

  Steps to reproduce:
  1) Choose any non-Latin keyboard layout (recommended; Russian, Arabic)
  2) Proceed with installation. Arrive to the account set-up screen
  3) Type in your name in the non-Latin layout
      - The "Your username" field is not filled automatically
  5) Try typing a username you wish to use
      - It cannot recognise the characters and won't let you continue.
      - It will thus complain that usernames should begin with lower-case letters

  No matter if the letters are lower or upper case, it simply cannot
  recognize them.

  The user cannot finish installation using the non-Latin layout. The
  user is forced to manually add English or a similar layout that has
  Latin characters.

  A good solution could be adding a fallback English (US) layout to
  every non-Latin keyboard layout, or even better, letting the user to
  choose an additional keyboard layout himself and a keyboard shortcut
  to switch between the two keyboard layouts.

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