They do not encrypt your traffic, nor do they change your IP.
If authorities in your location are likely to prosecute based on the sites you visit, a smart DNS provider is not right for you. If you need to quickly access a blocked website on a one-time basis, a free proxy might be the way to go.
It’s the IP address that points at a server and directs your traffic.
DNS servers are responsible for converting domain names into their associated IP addresses.
Once again, it goes without saying that using Google Translate to bypass internet blocks offers no privacy protections.
A proxy will hide your IP address, thus helping to disguise your location. The lack of encryption means proxies are not as secure as VPNs; they are an excellent option to get around blocks on work and school networks but are not suitable for browsing which requires anonymity. You’ll also find they often have issues with page formatting and images.