Two years ago I took Wavery Labs’ Ambassador Interpreter for a spin—or rather, a listen—and found the unique earphoness a powerful and effective way to facilitate one-on-one, multilingual conversations. Now Waverly is back with a new product: a smartphones app called Forum that is built to facilitate one-to-many communication in multiple languages for up to 50 participants.

The concept is simple. Everyone in the group launches the app, and the “leader” of the group—ideally the person that will be doing most of the speaking—initiates a session as the host. Everyone else joins the session either by scanning a provided QR code or tapping in a six-digit number, essentially joining a group chat. All supported languages, 25 at present, are translated in real time within the app to every member of the session. Since it’s all on an app, you can be in the same room or (more usefully) scattered around the globe.

While Forum is optimally designed for presentations or group meetings where one person is doing most of the talking and the bulk of the other session members are mostly listening in silence, it doesn’t have to work that way. Any number of participants can actively speak in their own language and have their comments translated for the group, each receiving a different translated language. 25 people could be speaking in 25 different languages, and the app will translate them all into each listener’s chosen tongue, in both text and voice, as selected.

If this sounds a little chaotic, I can assure you it is, and there’s a significant learning curve when it comes to mastering Forum. It’s best to start practicing, as I did, in a one-on-one situation so you can get the hang of things. It’s a little tricky to remember to hold down the “talk” button, say what you want, then wait for it to be translated on the other side—and do it all again when the other party responds. In situations like this it’s easier to set the app to listen to everything without having to hold down the “talk” button, though if you’re standing within earshot of one another and both phoness start picking up what both users are saying, this can get a little confusing.

Expand your chat session to five active speakers and it gets even wilder, and the more people that are talking, the more complicated things become. The biggest problem is learning how to pause appropriately while translations are being delivered, and knowing whether and when it’s OK to speak. Crosstalk can be an issue in group discussions, and my testing led to a lot of instances of “oh, sorry, no, you go ahead” appearing in the translation. In most cases, I found it much simpler and more natural to turn off the audible translation and just use the app to read live subtitles if there was any back-and-forth discussion going on.

No matter how many folks are listening, things are a lot better the fewer people that are talking. Waverly says as much itself. Some of the most impactful use cases, per the company, are polyglot shareholder meetings that allow analysts to listen to executive comments in their native language, and church services that can be delivered to a multilingual congregation. In both cases, the bulk of what is spoken is from just one person. Forum can also be effective for global teams that meet regularly over video chat, if the teams are small and have some base level of familiarity with one another. That can also help make those pregnant pauses a bit less awkward.

The quality of the interpretation is highly dependent on the clarity of the speaker, as with most voice translations. The more mush-mouthed someone is, the less coherent the translation will be. Forum also made some weird choices with some of its translations during my testing. One speaker made a reference to “one-to-one” meetings and Forum curiously translated this as “12:59.” Most of the time, though, I was at least able to get a strong sense of what was being said. Forum isn’t perfect, but it’s definitely good enough.

However, Forum is decidedly not cheap. The app requires a monthly subscription (with no long-term commitment) with several different tiers available, each offering a different number of total minutes and total number of participants in a session. For $25, you get 3 hours of interpretation for up to 5 participants. For $60, you get 10 hours with 20 participants, and $130 gets you 25 hours with 50 participants. If you need more beyond that, Waverly says it will set you up with a custom configuration.

There’s also a free tier, which is handy for very occasional users, offering 25 minutes a month for three participants. The free tier is also limited to 10 total sessions per month, while all the paid tiers include unlimited sessions. (Side note: Your minutes count only when you are actively speaking. Listeners don’t burn minutes listening to translated audio, and in fact you can use the app without even registering if you want to be just a passive listener and don’t ever plan to speak.)

If you just need occasional multi-speaker translations—and can persuade everyone in your group to download an app and join a session at the same time—Waverly Forum is a nice tool to have in your arsenal. The free version may be enough for most, and I expect most users who need the paid versions will have some kind of corporate support in covering its not-insignificant cost. At the highest level, a sustained subscription works out to more than $1,500 per year, which is a massive investment in something you don’t even own. And that’s per user.

Again, it’s important to stress that Forum is really built as a solution for multiple users, each with their own device. If you’re simply trying to catalyze a one-to-one—er, 12:59—bilingual conversation through a single device, it’s not a good fit.