Here are some English words that might capture the nuance of "haklana," depending on the context:
* Hesitate: This is the most common and general translation.
* Stutter: This implies a more pronounced speech impediment.
* Stammer: Similar to "stutter," but perhaps slightly less severe.
* Falter: This suggests a momentary loss of confidence or fluency.
* Waffle: This implies an inability to make a clear decision or statement.
You might also use a phrase like "struggle to speak" or "have trouble finding the words."
The best translation will depend on the specific context and the level of hesitation being conveyed.