I am e.g. trying to find something like this on an international websites:
unicode: "\u202aDansk\u202c\u200f"
html: ‪Dansk‬‏
This doesn't work: //*[contains(text(),'‪Dansk‬‏')]
XPath itself does not provide any way of escaping non-ASCII characters. But the host language in which XPath strings are written often does.
When XPath expressions are written as string literals in a programming language such as Java, C#, Python, or Javascript, you can generally use backslash escaping:
xpath.evaluate("contains(., '\u202aDansk\u202c\u200f')")
When XPath expressions are written as attributes in an XML-based language such as XSLT or XSD, you can use ampersand escaping:
select="contains(., '‪Dansk‬‏')"
In any other context, you'll need to check the specs for your host language environment.