- Draft booster (box): Obviously these are available in all 11 currently supported languages (https://mtg.gamepedia.com/Printed_languages)
- Collector booster (box): Based on this announcement, it seems like they only exist in English, French and Japanese.
- Prerelease packs, Bundles, Planeswalker decks: These seem to exist in all 11 languages, but I have not found offocial confirmation. I have compiled some information from infrabel.eu and gtsdistribution.Com (european and american distributor), and youtube unboxing videos, but I cannot confirm all products in all languages.
- Starter Arena kit: Only infrabel.eu contained information on this and had them in stock for all European languages. I assume they also exist in all Asian and Russian languages?
- Welcome booster: No information whatsoever except for the obvious english version.
- Promo pack: According to mtgwiki, "Promo packs are available in all languages in which Magic is printed, and foil promo packs are available in Chinese Simplified, English, French, German, Italian, Japanese, Portuguese, Russian, and Spanish.". Unfortunately, there is no source for this information?
If anybody has reliable information or anecdotal data, please share.
Additionally, if you can confirm the information to be true for all recent sets (magic 2019 forward) that would be great.