This is not really a topic to actively involve a games forum in.
The inscription you quote is from the sword of Alphen aan den Rijn, and is reasonably well explained by Marc van Hasselt of Utrecht University as an invocation - among others of Saint Martin. You link the article cnet.com/news/british-museum ... CAD590a51e referring to that explanation.
The River Witham sword presented by the British Museum on britishmuseum.org/explore/hi ... sword.aspx has a shorter inscription, +NDXOXCHWDRGHDXORVI+ . It is likely also an invocation, but consists completely of unusual shorthands and symbols that may not even be letters. Attempting to read it requires at least rare expertise of obscure worldly paleography of the time.
Trying to explain its meaning just from Latin is like trying to explain Bibbidi-Bobbidi-Boo just from English.
Here's a reading just for fun, made over breakfast.
We have to decipher +NDXOXCHWDRGHDXORVI+. We take that apart into +NDXOX-CHWDRGHD-XORVI+, and assume NDXOX and XORVI to be generic parts of an invocation, just like similar parts of the inscriptions on the Alphen sword.
This leaves CHWDRGHD, which doesn't really look like weird Latin shorthand. The River Witham blade is supposed to be German - so we look for medieval German saints which might fit CHWDRGHD. It would be great, if there were a single German saint with some relation to swords or sword manufacture, wouldn't it?
Lorsch Abbey is known for having manufactured weapons, and suspected to be a source of Ulfberht-swords. See sueddeutsche.de/wissen/ulfbe ... -1.2188338 on Ulfberht-swords for this:
(sorry, German medieval history needs to resort to German sometimes)
So Chrodegang would be just great. It doesn't look very much like CHWDRGHD?