In an international meeting of $n \geq 3$ participants, 14 languages are spoken. We know that:

- Any 3 participants speak a common language.

- No language is spoken more that by the half of the participants.

What is the least value of $n$?
To find the least value of \( n \) such that any 3 participants speak a common language and no language is spoken by more than half of the participants, we can proceed as follows:

1. **Define the problem constraints:**
   - There are \( n \) participants.
   - There are 14 languages.
   - Any 3 participants speak a common language.
   - No language is spoken by more than \( \left\lfloor \frac{n}{2} \right\rfloor \) participants.

2. **Case 1: \( n \) is even, say \( n = 2k \):**
   - Each language can be spoken by at most \( k \) participants.
   - The number of ways to choose 3 participants from \( 2k \) participants is given by:
     \[
     \binom{2k}{3} = \frac{(2k)(2k-1)(2k-2)}{6}
     \]
   - Each language can cover at most \( \binom{k}{3} \) trios of participants:
     \[
     \binom{k}{3} = \frac{k(k-1)(k-2)}{6}
     \]
   - Since there are 14 languages, the total number of trios covered by all languages is at most:
     \[
     14 \binom{k}{3} = 14 \cdot \frac{k(k-1)(k-2)}{6}
     \]
   - For the condition to hold, the total number of trios covered by the languages must be at least the total number of trios of participants:
     \[
     14 \cdot \frac{k(k-1)(k-2)}{6} \geq \frac{(2k)(2k-1)(2k-2)}{6}
     \]
   - Simplifying this inequality:
     \[
     14k(k-1)(k-2) \geq (2k)(2k-1)(2k-2)
     \]
     \[
     14k(k-1)(k-2) \geq 4k(2k-1)(k-1)
     \]
     \[
     14(k-2) \geq 4(2k-1)
     \]
     \[
     14k - 28 \geq 8k - 4
     \]
     \[
     6k \geq 24
     \]
     \[
     k \geq 4
     \]
   - Therefore, the smallest possible value of \( n \) when \( n \) is even is \( n = 2k = 2 \times 4 = 8 \).

3. **Case 2: \( n \) is odd:**
   - If \( n \) is odd, say \( n = 2k + 1 \), the analysis is similar but does not provide a better bound than the even case. The constraints on the number of participants speaking each language and the number of trios remain the same, leading to the same conclusion.

Thus, the least value of \( n \) that satisfies the given conditions is \( n = 8 \).

The final answer is \( \boxed{8} \).