Non-Indonesian readers will begin to ask themselves:
If you're an Indonesian translating kurang then you're probably not comparing anything. You're simply saying:
As a general rule, when you use comparative adjectives, include the things that you're comparing in the same sentence.
If you're not comparing more than one thing, then don't use a comparative adjective.
The following examples each compare more than one thing.
Most Asians these days have less difficulty in intercultural communication than Europeans.
Most Asians these days have less difficulty in intercultural communication than in family communication.
Most Asians these days have less difficulty in intercultural communication than Asians did in the past.