Do I need a tour guide for Beijing and Shanghai?

Hi everyone!! I am heading to Beijing and Shanghai for 15 days and I am worried about the language barrier.

I know some really basic phrases, but I rely heavily on translation apps. Will I struggle to get around the subway and navigate tourist spots on my own, or is the infrastructure English-friendly enough for a solo traveler?

I'm debating whether to hire a local guide to avoid the stress of constant translation, or if the extra cost is unnecessary. From what I saw, Shanghai its easier, but I want to know if a guide is actually helpful or just an expensive convenience.

Thanks in advance!!