Please move the Moldovan Wikipedia to another, more accurate, language code, per the discussion on the wikitech-l mailing list (see the URL).
Here's what Brion said on the mailing list:
mo.wikipedia.org -> mo-cyrl.wikipedia.org
mo.wiktionary.org -> mo-cyrl.wiktionary.org
The official Moldovan language is the same as Romanian, using Latin
script and same orthography as on ro.wikipedia.org. Latin script was
officially adopted in 1989, replacing Soviet-era Cyrillic script; use of
Cyrillic script is still "official" in an unrecognized,
lightly-populated breakaway region but if people there use it, they
don't seem to edit Wikipedia...
The 'mo' language code has been officially deprecated from ISO 639-1/2
as of November 3, 2008; "Moldovan" in general use is just Romanian, and
is covered by ro.wikipedia.org.
mo.wikipedia.org has not actually been edited since December 2006.
mo.wiktionary.org seems to have.... 4 definition pages, which only
contain translations (no definitions!) Being inactive, these projects
could be closed in addition to / instead of the rename.
Use of tag 'mo-cyrl' would follow existing IANA-registered language
subtags such as 'bs-Cyrl' and 'bs-Latn' for Cyrillic and Latin script
Most likely, for compatibility we would redirect the existing 'mo' URLs
to the new 'mo-cyrl' ones, but they would now be visibly marked by the
subtag as being "yes we know, it's Cyrillic here". If we're going to
lock the site as well, adding a sitenotice pointing to the Romanian wiki
is probably wise.