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mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
TeeMassive · 6 months ago
Very interesting, but 20 minutes seems very low to fully try a language learning app. would you consider extending to a few hours?
mariano54 · 6 months ago
I'm sorry but we are not providing longer free trials at the moment. You can clear the cache to try again (but you will have to go through the onboarding).
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
icanhasjonas · 6 months ago
I love it!

Q: how do I change my name in the app?

mariano54 · 6 months ago
You can do this in the web app: https://app.issen.com/manage-account
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
0bi1A4xvXtQCO · 6 months ago
I created an account just to provide feedback. I would consider myself the core audiance and would be definitly be willing to pay for it. I am learning Japanese with, but, since I am living outside of Japan, struggle to find good opportunities to output on a regular basis. An AI-based language tutor would make my life much easier.

A few comments from the 20min trial I had:

- About the positive aspects: There were definitly parts of the conversation where I was genuinely suprised with the naturalness. Overall, I felt that the demo already helped me practice my output a bit. From this, I definitely believe that AI-based language tutors might become quite widespread soon as they could become really good language exchange partners. In my case, I still have low speaking skills (~Japanese N4, A2), so just having any chance to practice verb conjugations etc is already immensily helpful.

- I also like that there is no gamification aspect. I prefer apps where users can decide how they use them. A lot of Japanese learners, people already use anki for vocab, etc., so forcing extra vocab practice would me definitly quit the app.

Some feedback for improvement:

- Due to my still low speaking skills, I often need mid-sentence pauses which are at least 1-2 seconds long. When I pause, the sentence is already half-transcribed, sometimes in another language. I think I had moments where then the sentence is cut-off entirely. At least, it makes me pressured to finish the sentence in a fluent manner without much pauses.

- I know you want to have multilingual transriptions, but maybe you could add some language bias in transcribing the speech?

- About the cutting off: If you have some sort of VAD frontend: Maybe you could adjust its parameters based on estimated language skills of the users (beginners have longer pauses)

- I saw that my sentences were rated. But they were rated only in text, even though I said that my mistakes should be corrected right away (The speech-based AI partner just kept on talking about the topics). Maybe I have overlooked something, but is there some overview of my mistakes besides the text-based corrections?

mariano54 · 6 months ago
Thanks for the feedback.

1. The response latency / patience can be configured in the quick settings (tap the gear during the call).

2. There already is a bias in transcription. It's something we're actively improving, multilingual transcription isn't a solved problem yet

3. It is supposed to correct you actively if you have corrections enabled (check the settings). But we received feedback that it's not enough, so we will ramp it up soon

mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
yorwba · 6 months ago
If you have the correct furigana, you could even detect when the TTS model picked the wrong reading and regenerate.

But how do you know the furigana are correct? Unless you start out fully human-annotated text, you need some automated procedure to add furigana, which pushes the problem from "TTS AI picked the wrong reading" to "furigana AI picked the wrong reading."

mariano54 · 6 months ago
Yes it pushes the problem, but it's a much easier problem, and models like Gemini flash 2.5 do very well.
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
Kosirich · 6 months ago
Can it be used in a car? Is looking at the screen required?
mariano54 · 6 months ago
The mobile app can be used in a car (not the Web app). Looking at the screen is not required.
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
masspro · 6 months ago
I don't think I can trust TTS for language learning. I could be internalizing wrong pronunciation, and I wouldn't know. One time I tried Duolingo for Japanese already knowing a bit. To their credit I assumed it was recorded clips, until it read 'oyogu' as something like 'oyNHYAOgu', like it concatenated two syllable clips that don't go together. If I didn't already know, would I be trying to study and replicate that nonsense? So I don't know if I could trust TTS audio for language study regardless of what kind of tech it is. Sure mistakes can be unlearned over time spent immersing, but at much more effort than just not internalizing them in the first place.

Also Japanese specifically has this meme where it literally is a pitch-accent language but many people say it's not and teaching resources ignore it. E.g. 'ima' means either 'now' or 'living room' depending if syllable #2 is higher or lower. Clearly only applies to some languages, but is another dimension even harder to a learner to know there's a mistake. I have to imagine even other Latin languages probably have reading quirks where this could happen to me.

mariano54 · 6 months ago
Minimax's new model is quite good. We use their voices for some of our Japanese tutors. The pitch accent is almost perfect.

There are incorrect reading or Chinese readings occasionally, but you can tell when that happens due to the furigana being different

mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
xmodem · 6 months ago
I’m at a roughly A2 - B1 level at the language I’m learning and I picked up a whole lot of pretty basic grammar errors in the first conversation.

The app also used a bunch of constructions I’m not familiar with even though I specified I’m a beginner.

If I hired a human tutor and had this experience, I would ask for my money back.

mariano54 · 6 months ago
I'm sorry about that. May I ask what language you tried?
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
vibranium · 6 months ago
I’ve tried Greek (Athena voice) and the accent is terrible. It sounds like an English or American person speaking Greek!
mariano54 · 6 months ago
Thanks for pointing that out. Did you try the other ones by any chance?
mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
vibranium · 6 months ago
How does this compare to Langua?
mariano54 · 6 months ago
Langua is a nice app with more features than ISSEN. We focus on the voice chats, and I think our tech is better (intelligence, latency, realtime flow, voices, etc), especially for non english/spanish.

We are aiming to create a long term companion/tutor that gets to know you more and more, and can create customized curriculums, lessons, etc.

mariano54 commented on Launch HN: Issen (YC F24) – Personal AI language tutor    · Posted by u/mariano54
tanushv · 6 months ago
This might be the most obvious question regarding this, but how are you planning on competing with the entrenched competition for mindshare, namely Duolingo. This is probably technically superior, but from a user standpoint, it might not be so. Happy to be proven wrong
mariano54 · 6 months ago
Our market is different - ISSEN is more focused on intermediate and advanced students, and especially those that are willing to use a more difficult app in order to learn faster.

Also, having the AI voice tutor as our main feature allows us to iterate quickly, and be well positioned for future improvements in AI models.

As for marketing and GTM, we're in the super early stages, and there is definitely a lot of competition out there, it won't be easy.

u/mariano54

KarmaCake day220January 27, 2014
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