Each letter moves +1, -1, ….alternately except for L, which is –4. We have to find the word for the code IFWJBP. Add 4 to I then -1, +1 alternately to the remaining letters. The word will be MEXICO.

failadd means besttest  ---- (I)
failbed means bestrest ---- (II)
oarbed means goodrest ---- (III)
From (I) and (II)
fail means best 
add means test  
From (II)and  (III)
bed means rest
oarmenas good
So goodtest = oaradd

Tam ceno means sky blue----------- (I)
Cenorax means blue cheese--------- (II)
Aplmitl means star bright----------- (III)

From (I) and (II)
Tam means sky
ceno means blue
rax means cheese
From (II) and (III)
apl means star
mitl means bright. 

So, mitltam means bright sky.

Mallon piml means blue light ----------- (I)
Mallon tifl means blueberry ----------- (II)
Arpantifl means raspberry ----------- (III)
From (I) and (II)
Mallon means blue
Piml means light
Tifl means berry

From (II) and (III)
Arpan means "rasp" in raspberry. 
The word piml, which means light.

That rules out choices a and c. Arpan in choice b means "rasp",

Mallon means blue; pimlmeans light; tifle means berry; and Arpan means “rasp” in raspberry. The word piml, which means light, is required for word lighthouse. That rules choices a and c.

Arpan in choice b means “rasp”, so that rules out choice b.

Grana means big; melke means tree; pini means little; hoon means house. Therefore, granahoon means big house.

Gorbl means fan; flur means belt; pixn means ceiling; arth means tile; and tusl means roof. Therefore, pixnarth is the correct choice.

In this language,the noun appears first and the adjectives follow. Since agnos means spider and should appear first,choices a and d can be ruled out. Choice c can be ruled out because delano means snake.

Krekin means work; blaf means force; drita means ground; and alti means place. Drita means ground, so that rules out choices b and d. Choice c isn’t correct because blaf means force. That leaves choice a as the only possible answer.

Mallon means blue; pimlmeans light; tifl means berry; and arpan means “rasp” in raspberry. The word piml, which means light, is required for the word lighthouse. That rules out choices a and c. Arpan in choice b means “rasp”, so that rules out choice b. That leaves choice d the only possible answer.

In this language, the adjective follows the noun. From dionot and blyonot, you can determine that ‘onot’ means oak. From blyonot and blycrin, you can determine that bly means leaf. Therefore, crin means maple. Because the adjective maple comes after the noun, patricrin is the only possible choice.

Mallon means blue; pimlmeans light; tifl means berry; and arpan means “rasp” in raspberry. The word piml, which means light, is required for the word lighthouse. That rules out choices a and c. Arpan in choice b means “rasp”,

In this language, the noun appears first and the adjectives follow. Since agnos means spider and should appear first, choices a and d can be ruled out. Choice b can be ruled out because delano means snake.

Gorbl means fan; flur means belt; pixn means ceiling; arth means tile; and tusl means roof. Therefore, pixnarth is the correct choice.