For languages like Chinese asking for more than two chars is ridiculous
(issue #335).

Currently translated at 98.7% (910 of 922)

Currently translated at 95.8% (883 of 922)

Currently translated at 100.0% (922 of 922)

Currently translated at 100.0% (922 of 922)

Currently translated at 100.0% (922 of 922)

Currently translated at 100.0% (922 of 922)

Do not test for all database backends with old Django.

Currently translated at 100.0% (922 of 922)

This in memory backend is faster than MySQL.