The best sentences for building a useful speech recognition engine are colloquial, modern parlance. Some ideas to help you generate sentences are;
Paydalı dawıstı anıqlaw mexanizmin jaratıw ushın eń jaqsı gápler — awızeki zamanagóy tilde. Gáplerdi oylap tabıwǵa járdem beretuǵın birneshe ideyalar: