Because you're race is so short lived, they only know Common.

With their quick skittish movements and resistant lifestyle, the Blattodean receives a +2 to Dexterity and a +1 to Constitution.

When covering larger distances, the Blattodean drop to their additional limbs to quickly scuttle through. You may make a dash as a bonus action. You may use this racial ability a number of times equal to your proficiency bonus per long rest.

With a thick outer carapace, the Blattodean have a level of protection from outer physical harm. The Blattodean have a natural AC of 15, though in turn, armor is typically not made for their unusual body type, making them unfit for it. Though they may still equip shields and receive their benefits.

Quick to escape the scene, the Blattodean can take the Disengage or Hide action as a bonus action on each of its turns.

Being insectoid in nature, the Blattodean have similar options in movement. The Blattodean have a climbing speed equal to their walking speed along with proficiency on saving throws made to climb up a surface, however they are unable to propel themselves when in water, instead only able to keep themselves afloat and move with the waters flow.

With their focus on survival and shorter lifetime, the Blattodean do not need to sleep and tend to be alert at all times. The Blattodean don't require sleep, and may move around and perform light tasks while avoiding exhaustion and still benefitting from a short or long rest.

With their powerful mandibles, The Blattodean possess natural weaponry to use against their enemies. Whenever making a melee weapon attack, the Blattodean may use Bite as an additional attack, dealing 1d6+ your STR modifier.

Often born and dying in disease ridden conditions, the Blattodean have a built up resistance to such sickness. The Blattodean have immunity to Disease.