Hello, I bought another Elba machine 5 years ago; the English has improved to the point I can understand (I guess being part of the EU had an effect), but there were still glaring grammatical and spelling errors, much worse than any Chinese phone I've owned. You'd think the Germans were better: well only marginally, my Bosch dryer's instruction manual came with weird syntax even though the spelling was OK.
And don't get me going on Japanese products. Though the level of English has improved since the Japlish of the '80s and '90s, some of the smaller brands still come with laughable pidgin varieties of English in their manuals.
What I'm saying, it's very, very common to see manufacturers from non-English speaking countries stumble over English spelling. But this hasn't stopped countries like Japan, Germany, Italy and France from becoming world export powerhouses. So why should it hinder China?