However, a few years back it became common for most datasheets to be available in mandarin and english, and this year most PCB fabrication houses have gained support for putting chinese characters onto a circuit board (requires better quality printing, due to more definition needed for legibility).

Now there are a decent number of devices where the only documentation is only available in mandarin, and the design process was clearly done with little or no english involved.

Not everything changes though - gold plating thickness is measured by the micro-inch. Components often still use 0.1 inch pin spacing. Model numbers of chinese chips often are closely linked to the western chip they replace, the names of registers (in the cpu register sense) are often still english etc.