Hi,
Different subdomains by language is not currently supported by LE.
I'd like to see some references that this is the best approach in terms of SEO. From my knowledge in SEO:
- every link to your website counts as a vote and highers your pagerank
Therefore, having both languages on the same domain, with sub urls for languages, should get more votes for your domain. Using a subdomain with language would isolate the votes for each site.
I am not an expert in SEO, if you have expertise that this is incorrect, let us know and we will adjust.