Wild in Chinese / Japanese...

天生狂野 is “Born To Be Wild” (like the Steppenwolf song) in Chinese (Mandarin).

If you get to the deep meaning, the first two characters can mean “born” but refer as much to the nature, disposition, calling, or innate qualities of something or someone.

The last two mean coarse and/or wild.

So it kind of means that it is your nature to be wild.

This is the Japanese version of “Born To Be Wild” (title of the Steppenwolf song).

The more literal meaning in Japanese for this phrase is “Let's go wild.”

Note: Because this title is entirely Japanese Hiragana and Katakana, it should be written by a Japanese calligrapher.

野玫瑰 is the simplest way to write “wild rose” in Chinese.

The first word literally means wild. The second is the single-character form of rose or roses (plural or singular is not specified in Chinese characters). This can also be translated as “sweet briar.”

雁 is the single character for wild goose in Chinese, Japanese, and Korean.

This means wild monkey in Japanese.

Also refers to a 1970 Japanese film of the same name.

狂 is a single character that means “crazy” in Chinese, Japanese Kanji, and old Korean Hanja.

狂 means crazy, unrestrained, lunatic, insane, confused, deranged, wild, or mad.

This can also refer to an extreme enthusiast (like a football fan). But then, it can also refer to a person possessing a mental abnormality.

In some contexts, this can mean conceited (it probably won't be read that way on a wall scroll).

A warning: 狂 is an odd selection for a wall scroll. You should only order this if you plan to bewilder or confuse those who see it. It kind of says something about you, something that most native Asian people will not view in a good light.

荊棘 is a Chinese and Japanese Kanji word that means: thistles and thorns; brambles; thorny undergrowth; wild rose; bramble; briar patch; briars; thicket; the bush.

Sometimes this term is used figuratively to refer to an obstacle or source of difficulty that makes your path difficult.

This Japanese word means fierce.

This can also be translated as rough, wild, rude, harsh, gruff, or violent, depending on context.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

野馬 is the Chinese title for a mustang.

The first character can mean wild, free-roaming, or feral.
The second character means horse.

冒険野郎 is a Japanese title that means “adventure lover.”

This literally means something like “adventure wild man.”

This is a funny choice for a wall scroll, but it's a legitimate word in Japanese.

草 means grass or straw in Chinese, Japanese Kanji, and old Korean Hanja.

Depending on the context, this can also mean a manuscript, draft (of a document), or rough copy. In the botany context, it can also refer to weeds, herbs, thatch, or plants.

草 is also the first character of caoshu or sōsho, the Chinese and Japanese wild cursive script style of calligraphy.

Sometimes written in variant form 艸.

This can be the surname Sou/Sō, or the given name Kusa in Japanese (there are also other romanizations for this Kanji).

滴水穿石 is a Chinese proverb that means, dripping water penetrates stone.

The figurative meaning can be translated as:
Constant perseverance yields success.
You can achieve your aim if you try hard without giving up.
Persistent effort overcomes any difficulty.

While 滴水穿石 is the most common character order, you will likely see 水滴石穿, might see 滴水石穿, and will rarely see 小水穿石 in the wild.

沈魚落雁 is an old proverb that literally means “fish sink, goose alights.”

...But this takes some explaining. This is a proverb from Zhuangzi (莊子), who lived in the late 4th century BC.

This figuratively refers to female beauty that is so captivating that even the birds and beasts take notice.

Perhaps a better and more accurate way to describe this is to say that it speaks of the charms of a uniquely beautiful woman who is so beautiful that fish stay on the bottom of the water and flying wild geese fall from the sky in shame.

This proverb is so famous that it is also known and used in Japan (same characters, different pronunciation).

Note: This can also be written 沉魚落雁 instead of 沈魚落雁 (just the first character varies slightly).

靈氣療法肇祖臼井甕男先生遺訓招福の秘法萬病の霊薬今日丈けは心配すな感謝して業を励げめ人に親切に is an alternate version of the precepts or tenets of Reiki by Usui Mikao.

It is impossible to be sure which version or versions were actually written by Usui Mikao. This is the less common of the three versions that you might see in the wild.

Here is a breakdown of the characters and a rough translation:
靈氣 療法 肇祖 臼井甕男。
Reiki therapy founder Mikao Usui
先生 遺訓。
Teacher's testament 招福の秘法,　萬病の霊薬。
Invite blessings of [the] secret method, 10,000 illnesses of spiritual medicine.
今日丈けは: 怒るな, 心配すな,　感謝して,　業をはげめ,　人に親切に。
At least for today: Do not be angry, do not worry, be grateful, work with diligence, [and] be kind to people.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

動物王國 is literally what it says.

There is even a TV show in China that is similar to Wild Kingdom or what you would currently see on the Discovery Channel that has this same title.

For your information: In the Chinese way of thinking, the Tiger is the king of the animal kingdom (lions are not native to China, so the tiger took the role that we have given to the lion in our western way of thinking).

The modern Japanese version has a slight variation on the last character (国 instead of 國). Let me know if you want the modern Japanese version (國 would be considered the old or traditional version).