Visvanath Ratnaweera

It's all here: https://docs.moodle.org/en/Moodle_migration.

If I put multilang text in the Description of a Choice activity, it shows the full text with multilang tags rather than filtering it. For example I see:
<span lang="en" class="multilang">Join your group!</span><span lang="si" class="multilang">ඔබෙ...

The Choice name field behaves as expected. i.e. the name changes with the selected language.

Moodle 2.7.8+ (Build: 20150521)

Ja, ich rede vom https://docs.moodle.org/en/Multi-language_content_filter. Habe nur kuerzlich entdeckt. Damit kann man verblueffend einfach mehrsprachige Kurse erstellen. Da die betr. drei Sprachen drei verschiedene Schrifte verwenden, fallein die kleinsten Unstimmigkeiten sofort auf. Bsp. "Behaviour of Course full name and Course short name with multilang" https://moodle.org/mod/forum/discuss.php?d=315526. Das Thema wird mich eine Zeitlange beschaeftigen, befuerchte ich.

I'm glad that it helped.

About the "filter": No, the old URLs in the DB need to be replaced with the new URLs. So it is a DB manupulation whatever the method you use. If you are comfortable with dumping the DB, do a text search-and-replace and feed the dump back in to the DB, you can do just that.

Having said that, a https://docs.moodle.org/en/Filter could do the same on-the-fly as you say. To my knowledge there is no ready-made one.

At the Free Culture level that is the price you pay for Software as Service as opposed to Free Software. (This is what Richard Stallman is preaching three decades. You may or may not like it. In any case, a digression.) In the case of Moodle, you could request the whole course as a zip file and upload in to another Moodle.

There is another level: How much of your teaching material is LMS-dependent? How much is "neutral"? Depending on the answer, you can move from one LMS to another easily, or not so easily.