Why did he want so much to preserve written language among his descendants?

Thus he preserved the peace among them and limited the influence of any one foreign power within his kingdom.

The original document is still preserved among English public records.

The first is to preserve solidarity among our citizens.

Cliff, in turn, had preserved his own reputation among crooks.

That rule had barred foreign languages to preserve harmony among employees.

Both worked hard to preserve the civil relations among ethnic groups that have long graced Baltimore.

It is the only castle preserved among 26 Japanese castles in the southern region.

This is to preserve equality among creditors as no enforcement action can be taken against a bankrupt.

There, it's used to preserve orderly lines among the hundreds of people waiting for a healing touch during a prayer service.