In official vscode documentation i have seen that is possible to create custom snippets for each language. https://code.visualstudio.com/Docs/customization/userdefinedsnippets>
Common users snippets are currently not supported, but there is a VSCode issue tracking this feature request. Please let us know if this is something you would find useful.
For completeness, VSCode extensions can register the same snippets for multiple languages but they must explicitly specify all languages they provide snippets for (there is no "language": "*"
option).