Pittsburgh-based language learning app Duolingo has completed its first acquisition, buying Detroit-based animation studio Gunner, which has been handling animation on Duolingo’s app for the past two years.

Gunner will continue to produce art and animation for Duolingo’s flagship all-ages language app, and its Duolingo ABC app, which teaches literacy to kids three- to six-years-old. As part of the acquisition, 15 Gunner designers, illustrators and animators will join Duolingo’s team.

Gunner’s existing Detroit office will be converted to a Duolingo office, joining locations in Pittsburgh, New York, Seattle, Beijing and Berlin. Duolingo did not acquire Hobbes, Grunner’s sister studio, which will continue to operate independently as a studio focused on product design and emerging technology.

Gunner will work to accelerate the development of Duolingo’s future marketing campaigns and products, such as its upcoming app Duolingo Math, which offers learning materials for third-grade math and launches in the coming months. It will also work on Duolingo’s character roster, which currently numbers 10, including the company’s owl mascot.

The company’s animation operations are overseen by industry veteran Linda Simensky, who joined the company last year. Despite its upgraded capabilities, the company has no plans to expand into other animated content outside of apps, a spokesperson confirmed.

According to Duolingo’s last earnings report, total revenues for the second quarter of this year were US$97.5 million, an increase of 51% over the previous quarter. Its paid subscribers totaled 3.3 million at the end of the quarter, 71% more than the previous one.