text: Russian language has "forms" instead. A verb in Russian has either perfective or imperfective aspect. Still, it is challenging for a Russian to master the difference between a simple tense and its perfect tense counterpart.
  Some prepositions are mixed up in Runglish ("during" vs "for", "in" vs "at"/"оn").
  It is very common for Runglish speakers to misuse double negation. ("I didn't do nothing" (instead of "I didn't do anything"); and use wrong tags ("You don't like it, do you?" - Runglisher may ambiguously answer "Yes, I don't" / "No, I like it").
  G and J may be confused in Runglish speech: programmers in Russia would often pronounce "Git" as "Jit", confusing it with another "JIT" - Just-in-time compilation technology. Another example: GSM abbreviation in Runglish sounds as "Jay Sam".
  The pronunciation of the letter R varies between many languages, and Russian is no exception: in Russian, the typical sound would be alveolar trill (like in Italian, Spanish or traditional Scottish English). Conversely, English "R" may be hard to interpret for a Russian as "r" and not a "v/w" sound if any ("horn" vs "hone").
  Transliteration-related speech issues
  Words "bat"/"bad"/"bet"/"bed" are especially difficult for native Russian speakers to tell apart. Those words would be transliterated as бэт, бэд, бет, бед respectively.