There shouldn't be any problem reading Pluto with bare minimum if any knowledge of Astro Boy. Any prior knowledge is at most a bonus, the story is self contained. The feel and details have also been changed to better match the author of Monster.

For manga similar to Heterogenia: I can't remember much, so I'll add cultural difference ones too.

The closest that I know of is not a manga, but a visual novel called The Expression Amrilato. The MC randomly transitions into an extremely similar parallel world, but where people speak a modified Esperanto. Much of the game is about learning the language, apparently padded out with g-rated yuri. I haven't played it, so I can't say how good it actually is.

The currently airing anime Fumetsu no Anata e / To Your Eternity is about a completely blank slate mimic, that has to learn and gain an id from scratch. This includes not starting with any concept of speech, (or even food). It's Also just a good, original show. The manga original is rated highly, but I haven't read it. If you watch it, you may want to not watch the opening song (starts ep 2) because it's visuals are clips of future episodes.

I was summoned by the demon lord, but I can't understand her language is a fluffy comedy where a guy is summoned by a young demon lord but can't speak the world's language.

Salaryman ga Isekai ni Ittara Shitennou ni Natta Hanashi is an isekai about a salaryman who becomes a manager under the world's Demon King. He has to help unite the races under the king, which means he has to understand them, and solve their issues.

Arakawa Under the Bridge is about a weird/surreal characters that live in their own mini society under a bridge, with the MC being part of the regular world. No language barrier, but conflicts with different ways of being.

Natsume's Book of Friends doesn't deal with linguistics, but a teen figuring out his place in the world after being repeatedly abandoned as an orphan because he can see Yokai. The Yokai have fundamental differences, like perception of time, and what drives them, and what they're capable of.

Maoyu: Archenemy and Hero "Become mine, Hero" "I refuse" is an economics manga where the human hero and the archenemy demon lord secretly pair up to solve the issues of their combined peoples. It was originally a light novel, and there's two other versions of the manga, including this one. There's an anime as well, which once more has another art style.

I also read a manga about a character from Tokyo learning about one of the dialects in japan. I can't remember the name, or specific regional dialect, but it was like how colloquialisms in Australian or Irish/Scottish can at times be its own language.

There shouldn't be any problem reading Pluto with bare minimum if any knowledge of Astro Boy. Any prior knowledge is at most a bonus, the story is self contained. The feel and details have also been changed to better match the author of Monster.

For manga similar to Heterogenia: I can't remember much, so I'll add cultural difference ones too.

The closest that I know of is not a manga, but a visual novel called The Expression Amrilato. The MC randomly transitions into an extremely similar parallel world, but where people speak a modified Esperanto. Much of the game is about learning the language, apparently padded out with g-rated yuri. I haven't played it, so I can't say how good it actually is.

The currently airing anime Fumetsu no Anata e / To Your Eternity is about a completely blank slate mimic, that has to learn and gain an id from scratch. This includes not starting with any concept of speech, (or even food). It's Also just a good, original show. The manga original is rated highly, but I haven't read it. If you watch it, you may want to not watch the opening song (starts ep 2) because it's visuals are clips of future episodes.

I was summoned by the demon lord, but I can't understand her language is a fluffy comedy where a guy is summoned by a young demon lord but can't speak the world's language.

Salaryman ga Isekai ni Ittara Shitennou ni Natta Hanashi is an isekai about a salaryman who becomes a manager under the world's Demon King. He has to help unite the races under the king, which means he has to understand them, and solve their issues.

Arakawa Under the Bridge is about a weird/surreal characters that live in their own mini society under a bridge, with the MC being part of the regular world. No language barrier, but conflicts with different ways of being.

Natsume's Book of Friends doesn't deal with linguistics, but a teen figuring out his place in the world after being repeatedly abandoned as an orphan because he can see Yokai. The Yokai have fundamental differences, like perception of time, and what drives them, and what they're capable of.

Maoyu: Archenemy and Hero "Become mine, Hero" "I refuse" is an economics manga where the human hero and the archenemy demon lord secretly pair up to solve the issues of their combined peoples. It was originally a light novel, and there's two other versions of the manga, including this one. There's an anime as well, which once more has another art style.

I also read a manga about a character from Tokyo moving to the learning about one of the dialects in japan. I can't remember the name, or specific regional dialect, but it was like how colloquialisms in Australian or Irish/Scottish can at times be its own language.

There shouldn't be any problem reading Pluto with bare minimum if any knowledge of Astro Boy. Any prior knowledge is at most a bonus, the story is self contained. The feel and details have also been changed to better match the author of Monster.

For manga similar to Heterogenia: I can't remember much, so I'll add cultural difference ones too.

The closest that I know of is not a manga, but a visual novel called The Expression Amrilato. The MC randomly transitions into an extremely similar parallel world, but where people speak a modified Esperanto. Much of the game is about learning the language, apparently padded out with g-rated yuri. I haven't played it, so I can't say how good it actually is.

The currently airing anime Fumetsu no Anata e / To Your Eternity is about a completely blank slate mimic, that has to learn and gain an id from scratch. This includes not starting with any concept of speech, (or even food). It's Also just a good, original show. The manga original is rated highly, but I haven't read it. If you watch it, you may want to not watch the opening song (starts ep 2) because it's visuals are clips of future episodes.

I was summoned by the demon lord, but I can't understand her language is a fluffy comedy where a guy is summoned by a young demon lord but can't speak the world's language.

Salaryman ga Isekai ni Ittara Shitennou ni Natta Hanashi is an isekai about a salaryman who becomes a manager under the world's Demon King. He has to help unite the races under the king, which means he has to understand them, and solve their issues.

Arakawa Under the Bridge is about a weird/surreal characters that live in their own mini society under a bridge, with the MC being part of the regular world. No language barrier, but conflicts with different ways of being.

Natsume's Book of Friends doesn't deal with linguistics, but a teen figuring out his place in the world after being repeatedly abandoned as an orphan because he can see Yokai. The Yokai have fundamental differences, like perception of time, and what drives them, and what they're capable of. I started watching the 2nd season, then later saw the first, and I don't regret it, though watching in the regular order is probably more reliably good.

Maoyu: Archenemy and Hero "Become mine, Hero" "I refuse" is an economics manga where the human hero and the archenemy demon lord secretly pair up to solve the issues of their combined peoples. It was originally a light novel, and there's two other versions of the manga, including this one. There's an anime as well, which once more has another art style.

I also read a manga about a character from Tokyo moving to the learning about one of the dialects in japan. I can't remember the name, or specific regional dialect, but it was like how colloquialisms in Australian or Irish/Scottish can at times be its own language.