By highlevel I mean Master or PhD level science . As far as I know they teach in English at that level in Germany and Japan . At least the best and most uptodate materials will be in English . Aren ' t you just assuming they teach in their own language because their countries have overall mediocre English , yet they have advanced tech sectors . In contrast , my guess is most people in these hightech sectors will be fluent in English , far above the national average . Guess we ' ll need a German or Japanse PhD to confirm . That said , I do think China has the most potential to teach in their native language at the highest academic levels , providing they can be bothered to translate the English materials and keep their experts from emigrating . Though I don ' t think this is a good development , as Chinese and English research journals will become mutually inaccessible causing knowledge fragmentation or more delays in cuttingedge science . In other words , not only is it hard to reach the highest levels in a nonEnglish language , it is undesirable .