wasteomana
First Post
I'll go against Zathris on the idea that making a plot device that revolves around the Dwarven Language is a bad idea if you are DMing for a group of people who don't have that language on the list. Language as a plot device is something I've used and seen used pretty extensively. I've only seen it used wrong when it is a dead-end for the players "Oh, well nobody speaks the language of the quest giver, so session over". It should be something the players can overcome and have to deal with.
As far as Traveler's Insight is concerned, consider talking with your DM about it. The DM should be on the same page as you regarding how passive insight works before you build something that is going to have a crazy passive insight. With Traveller's Insight it is not hard to get your passive to beat Hard DC by a lot which should mean its nearly impossible to lie to you and standing illusions should melt before your eyes. If the DM is not on that page that could get annoying for both of you.
That being said if you are trying to get more languages you should try for things that allow you to pick Forgotten Realms languages. A race with an extra language that you can take as Thayan, or background in a language not in the PHB. The Scholar ability only gives you the languages in the PHB. Most races start off with Common + one at minimum which means you are getting 8 from Scholar. Not that it is terrible to pick up 8 languages, but there are a ton of other languages that exist in the game. All that being said, talk to your DM about what languages exist in their world. I've seen several DMs that make more or less languages a thing.
As far as Traveler's Insight is concerned, consider talking with your DM about it. The DM should be on the same page as you regarding how passive insight works before you build something that is going to have a crazy passive insight. With Traveller's Insight it is not hard to get your passive to beat Hard DC by a lot which should mean its nearly impossible to lie to you and standing illusions should melt before your eyes. If the DM is not on that page that could get annoying for both of you.
That being said if you are trying to get more languages you should try for things that allow you to pick Forgotten Realms languages. A race with an extra language that you can take as Thayan, or background in a language not in the PHB. The Scholar ability only gives you the languages in the PHB. Most races start off with Common + one at minimum which means you are getting 8 from Scholar. Not that it is terrible to pick up 8 languages, but there are a ton of other languages that exist in the game. All that being said, talk to your DM about what languages exist in their world. I've seen several DMs that make more or less languages a thing.