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I've started writing my own language by trying to add static typing to NanoRust, but that's obviously a ton of work.
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InfluxDB
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This won’t help your actual goal, because this is a research language, but check out Val. The lang is based around Swift’s value semantics model, which has some great performance optimizations.
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I'm not a huge fan of Lua but I think it is at least way more popular and better on every measure than TCL. There are plenty of other better less well-known options too: Rhai, Wren, AngelScript, Starlark (for some use cases), etc. There's a good list here.