Is age a constraint to learn new languages?

I do think age is not helpful. Some can overcome it.

individual will is very important when it comes to learning new language.

A research has proved that learning a language can increase your brain size. Hence age cannot be a factor. And learning doesn't have an age limit.
While researching found something interested.
Edit [Moderator]: Link removed

Learning has nothing to do with age because wisdom is not calculated in numbers I think life is like an endless journey of never ending learning. We can learn even in the deathbed and thus age is not a constraint. Thanks for sharing inspiration!

When you are older you just learn a little slower and remember a little less. You are absolutely capable of learning new stuff language or whatever but you need more effort to do so. It's not a big obstacle anyways.

HIDDEN LANGUAGE (HOLY SPIRIT LANGUAGE)(MEAT)

John 6:63
63 "It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life.
Rev 2:16
16 'Repent, or else I will come to you quickly and will fight against them with the sword of My mouth.
1 Cor 2:4-5
4 And my speech and my preaching were not with persuasive words of human wisdom, but in demonstration of the Spirit and of power,
5 that your faith should not be in the wisdom of men but in the power of God.
1 Cor 2:6-7
6 However, we speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing.
7 But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory,
Matt 13:10-11
10 And the disciples came and said to Him, "Why do You speak to them in parables?"
11 He answered and said to them, "Because it has been given to you to know the mysteries of the kingdom of heaven, but to them it has not been given.
Matt 13:13-14
13 "Therefore I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
14 "And in them the prophecy of Isaiah is fulfilled, which says: 'Hearing you will hear and shall not understand, and seeing you will see and not perceive;
1 Cor 14:10
10 There are, it may be, so many kinds of languages in the world, and none of them is without significance.
1 Cor 14:7-8
7 Even things without life, whether flute or harp, when they make a sound, unless they make a distinction in the sounds, how will it be known what is piped or played?
8 For if the trumpet makes an uncertain sound, who will prepare himself for battle?
Rom 8:27
27 Now He who searches the hearts knows what the mind of the spirit is, because He makes intercession for the saints according to the will of God.
James 3:17
17 But the wisdom that is from above is first pure, then peaceable, gentle, willing to yield, full of mercy and good fruits, without partiality and without hypocrisy.
Matt 13:16-17
16 "But blessed are your eyes for they see, and your ears for they hear;
17 "for assuredly, I say to you that many prophets and righteous men desired to see what you see, and did not see it, and to hear what you hear, and did not hear it.
Matt 13:18-19
18 "Therefore hear the parable of the sower:
19 "When anyone hears the word of the kingdom, and does not understand it, then the wicked one comes and snatches away what was sown in his heart. This is he who received seed by the wayside.
Mark 4:14
14 "The sower sows the word.
John 14:26
26 "But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.
John 3:34
34 "For He whom God has sent speaks the words of God, for God does not give the Spirit by measure.
John 3:33
33 "He who has received His testimony has certified that God is true.
Eph 1:9
9 having made known to us the mystery of His will, according to His good pleasure which He purposed in Himself,
2 Cor 5:5
5 Now He who has prepared us for this very thing is God, who also has given us the Spirit as a guarantee.
2 Cor 5:7
7 For we walk by faith, not by sight.
2 Cor 5:10-11
10 For we must all appear before the judgment seat of Christ, that each one may receive the things done in the body, according to what he has done, whether good or bad.
11 Knowing, therefore, the terror of the Lord, we persuade men; but we are well known to God, and I also trust are well known in your consciences.
Matt 4:4
4 But He answered and said, "It is written, 'Man shall not live by bread alone, but by every word that proceeds from the mouth of God.'"
Rev 22:18-19
18 For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book;
19 and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book.
(NKJ)
There are many languages in the world. Doctors have one, lawyers have one, intellectuals have one, common people have one. Seeing that the only guaranteed message in the bible comes from the Holy Spirit. So to guard that guarantee He even uses a special language. And the Holy Spirit only quotes verses, He explains verses with other verses. There are spirits in us trying to deceive us and they all speak the same language carnal. So we can discern the Holy Spirit He quotes verses. Now this is the meat understanding of the Word. The milk understanding is done with the carnal language, the meat understanding is done with only verses. Its an unknown tongue to the carnal mind.

II Jn 1:8-11
8 Look to yourselves, that we do not lose those things we worked for, but that we may receive a full reward.
9 Whoever transgresses and does not abide in the doctrine of Christ does not have God. He who abides in the doctrine of Christ has both the Father and the Son.
10 If anyone comes to you and does not bring this doctrine, do not receive him into your house nor greet him;
11 for he who greets him shares in his evil deeds.
(NKJ)

John 5:30
30 "I can of Myself do nothing. As I hear, I judge; and My judgment is righteous, because I do not seek My own will but the will of the Father who sent Me.
(NKJ)
Eph 6:17
17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God;
(NKJ)

John 7:18
18 "He who speaks from himself seeks his own glory; but He who seeks the glory of the One who sent Him is true, and no unrighteousness is in Him.
(NKJ)

John 8:42-43
42 Jesus said to them, "If God were your Father, you would love Me, for I proceeded forth and came from God; nor have I come of Myself, but He sent Me.
43 "Why do you not understand My speech? Because you are not able to listen to My word.
(NKJ)

Col 2:1-3

1 For I want you to know what a great conflict I have for you and those in Laodicea, and for as many as have not seen my face in the flesh,
2 that their hearts may be encouraged, being knit together in love, and attaining to all riches of the full assurance of understanding, to the knowledge of the mystery of God, both of the Father and of Christ,
3 in whom are hidden all the treasures of wisdom and knowledge.
(NKJ)

Col 1:26
26 the mystery which has been hidden from ages and from generations, but now has been revealed to His saints.
(NKJ)

1 Cor 13:8-10
8 Love never fails. But whether there are prophecies, they will fail; whether there are tongues, they will cease; whether there is knowledge, it will vanish away.
9 For we know in part and we prophesy in part.
10 But when that which is perfect has come, then that which is in part will be done away.
(NKJ)

GO TO BEGOTTEN WORD OF GOD

I learned one foreign language beginning in 6th grade, a second beginning in my 20's, and a 3rd beginning in my 50's. The third (Italian) was by far the most enjoyable and most painless learning. The first was traumatic.

As an adult you're more mature, more intrinsically motivated, have more "cognitive hooks" and have a larger English vocabulary which in turn allows you to recognize similarities in more foreign language words. For me at least, age was a blessing, not a curse, in learning new languages.

I'm pretty sure that the Critical Period Hypothesis has been effectively debunked with regards to second/foreign language acquisition.

I teach English and foreign language pedagogy to young adults who have been taught that they'll never approach fluency because they're already past that magical critical period. This makes many of them lower the bar for themselves and give up on what was once their dream of being fluent in English.

I explain to them that the CPH was never a scientific observation. It was an extrapolation from other aspects of mental development that do have critical periods.

First (native) language acquisition happens in the first few years of life, and during those years children don't have much else to do but acquire language. They're not doing it consciously; they're just acquiring a tool to get what they need.

As we get older, we go to school, university, etc, and have to spend a great deal of time on other subjects like math, history, etc. Then we've got to be productive adults, which means having a job, starting a family, etc. There simply isn't enough time to put into the foreign language, and in most cases adults aren't immersed in the language the way young native speakers are.

But there are exceptions that show that it is possible. Here in Korea, there is a famous English teacher, E. Bo-young, who became fluent (amazingly so) despite doing the bulk of her learning after she'd passed that alleged critical period, and doing so without going to a foreign country. Other examples are plentiful on Youtube. If you're motivated, you can do it.

Jacob Bronowski once observed that he learned Polish as a child, but that as an adult, he could not remember the Polish he had learned at all. But he then observed that because he had learned Polish as a child, he had developed the mental tools he needed to learn the other languages that he learned later, most of them as an adult.