Explanation:

When a contract is made by mistake regarding some foreign law, it is considered void. Let's understand the reasons behind this:

1. Mistake:
When a contract is made, both parties must have a mutual understanding of the terms and conditions of the contract. If there is a mistake regarding the foreign law, it means that one or both parties were not aware of the legal implications of the contract. This mistake can be classified as a mistake of fact or a mistake of law.

2. Void Contract:
A contract made by mistake about some foreign law is considered void. A void contract is a contract that is not legally enforceable from the beginning. It is as if the contract never existed, and both parties are not bound by its terms.

3. Lack of Consent:
In order for a contract to be valid, there must be free consent of the parties involved. When a mistake is made regarding the foreign law, it can be argued that there was a lack of free consent. The parties may not have knowingly and willingly entered into the contract if they were aware of the legal implications of the foreign law.

4. Legal Implications:
Foreign laws can vary significantly from one jurisdiction to another. If a contract is made without considering the specific laws of a foreign country, it can lead to serious legal consequences. This can include breaching local regulations, violating intellectual property rights, or even engaging in illegal activities according to the foreign law. Therefore, when a mistake is made about some foreign law, it undermines the legality and enforceability of the contract.

Conclusion:
In conclusion, a contract made by mistake about some foreign law is considered void. This is because the mistake undermines the mutual understanding and consent required for a valid contract. It also exposes the parties to potential legal risks and consequences. Therefore, it is important to ensure that all relevant laws and regulations are considered when entering into a contract involving a foreign jurisdiction.