Ask HN: Which programming language(s) are big companies backing?

Companies use multiple languages internally. But sometimes big companies either build their own language(s) or back one of the open source language project. Some for strategic reasons, some because off-the-shelf languages do not meet their requirements, and some because their bread-and-butter relies on it. My understanding is following major companies have heavily invested in the below listed languages: C++ (Microsoft and Facebook) C#, F# (Microsoft) Java (Oracle) Rust (Amazon, Mozilla) Go, Dart (Google) Swift (Apple) Any other major companies seriously backing programming language(s)? The reason I am interested in this is because it gives some indication of whether the language will get serious traction long-term or will become an "also ran" language. Languages that are used in the enterprise tend to survive longer. The ones that are used for consumer apps(e.g. Objective-C) or developed by companies for internal purpose tend to be expendable or get forgotten after initial hype.