We have years of experience building both and off the platform sits in multiple languages including Arabic, Chinese, Japanese and European languages.
For WordPress, we use both Multisite and WPML (WordPress Multi-lingual) to achieve client goals. Multisite is better for sites that have very different content. WPML works better where most of the content will be translated.
We have long term trusted partners that can help brands and charities who need transcreation, editing, proofreading, typesetting, content population, video editing, market research and social media translation.