هناك سمكة واحدة Is the mean of هناك

Why the color blue change in every sentence?  i didn't understand why this change of the name of the color blue???

أرْبَعُ سُلطانِياتٍ زَرْقَاء

قَميصٌ أزْرَقُ

Does lightning crashes or strikes?  I was at phone when a " lighting crashes" or " lightning strikes"...... what is correct?

Is it arabian very different than persian? Or the two languages are very similar like portuguese and spanish ?

ink, dye, paint, tint, does exist some difference between it? I can't see the difference, somebody can help me again?

Somebody can help me? What the difference between 'under', 'below', 'beneath', 'underneath' ?

What is the most dificult language to learn? I guess is thai. What do you think?

When use " beneath " and " under " ? I can't see diference translating it. Somebody can explain?

What's the diference between rover, wanderer and vagabond ? Help me