Laminates & thinner engineered floors (most of 14 or 15 mm planks) offer a click system and in case of a leak, partial replacement or local repairs is not an option. Floors should be replaced up to a door or another area where a threshold divider can be placed to separate the affected area with rest of the floors.
In your case, it sounds like we talk about engineered wood flooring, not laminate and the entire floors would need replacing. It is quite likely, that if you get in a flooring company to quote, that they will simply quote for replacement of entire area.
In addition, I would like to say that the "bouncing effect" which has appeared after a leak on engineered wood flooring, is an indicator that significant amount of moisture is trapped under the floors and replacement may have to go with dehumidification the subfloor as well. This type of flooring is resilient to some moisture, but up to certain level.