No, that's more like four languages: Typescript, CSS, HTML and the JavaScript the TS gets compiled down to. You can't just write TS once, and never touch it again, because you are now targeting a webbrowser and running a webserver, and are probably using a billion NPM packages. None of those are 'static' for a year, let a long a 'long time'.
We're talking about low maintenance, low security risk and long lasting.
None of those are compatible with transpilers, node, javascript or web tech in general.