Want your WordPress form builder plugin to be immediately translated into the language you need? To avoid being frustrated that WordPress itself supports your language but your WordPress form plugin doesn’t, make sure to choose the right plugin in the beginning.
Manually translating a plugin can and will take ages and is a lot of work for your developer. In case you need to hire a translator, it will be even more pricey and time consuming. Thus, choose wisely.
Most form builder plugins are available in several languages. But if th language you are looking for is, well, not very widely spoken, chances are slim that they will have the translations out of the box.
However, there are more possibilities. A lot of form builder plugins offer the possibility to translate your forms, messages and notifications via WPML or Polylang.