At the moment, we have an ongoing project to improve the Wikimedia Commons integration in OpenRefine, to address the most urgent issues that have been reported there. This is part of a WMF-funded project focused on the train-the-trainers program. This development work will be done by Wikimedia Sweden (we have been discussing that with them, I guess we could do a formal announcement soon too).
In itself, that's unrelated to lexemes, but the reason why I mention it is that it's an attempt to partner with Wikimedia organizations to help them build up in-house capacity to work on Wikimedia integration in OpenRefine. On the long term, I hope this helps us maintain and develop such integrations 
My hope would be that this partnership works out well for the Commons integration and that people see it as a viable way forward. A similar arrangement could be used for developing a lexeme integration (be it by Wikimedia Sweden, another chapter, or another organization entirely).
So, one way you could help with this would be to help identify who those partners could be and looking for potential funders. At the moment, it seems difficult to get funding from WMF for such work, but there might be other ways to make this happen.
You might ask: why not do that in-house, within the OpenRefine project directly? It would also be possible for sure, but at the moment we haven't got any funding for it nor volunteers who would like to work on this. Also, we have developed quite a bit of Wikimedia integration in OpenRefine over the past years (first for Wikidata, then generalizing to Wikibase, then adding support for Wikimedia Commons) and we need to be realistic about our capacity: each new integration we develop naturally creates an expectation of maintenance and support, which we need to be able to meet on the long term. At the same time, there are a lot of other aspects of OpenRefine that also require our attention. So personally, I have tried to shift my focus away from Wikimedia integration to working on improvements which benefit all OpenRefine users (including the Wikimedia community), for instance the reproducibility improvements at the moment.
Despite this shift, I am really supportive of more work being done on Wikimedia integration, and I will be working closely with Wikimedia Sweden to make this partnership a success. I would be similarly happy to support anyone else wanting to work in this space