Around 1880, while in Moscow and approximately simultaneously with working on Esperanto, Zamenhof made an aborted attempt to standardize Yiddish, based on his native Bialystok (Northeastern) dialect, as a unifying language for the Jews of the Russian Empire.
Try speed work. Speed work refers to a type of strength training which uses a much lower percentage of your maximal weight. Lifting weights with greater bar speed trains your stretch reflex and your ability to build momentum more quickly, as well as recruit more muscle fibers.
If you can easily do 20 repetitions, increase the dumbbell weight. Your goal is to find the maximum weight that still allows you to do 20 repetitions, but maxes out your endurance. This type of training doesnât specifically work on increasing muscle mass -- although that may be a side effect.